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Sensor Size and Depth of Field

It is commonly said that crop sensor cameras make images having both a narrower field of view and a greater depth of field. Well, that's partly right. (Bill Ferris)

It is commonly said that crop sensor cameras make images having both a narrower field of view and a greater depth of field. Well, that’s partly right. (Bill Ferris)

It is well-known that a lens of a given focal length will deliver different angles of view when used with cameras having different sized sensors. For example, the above image was made with a Nikon D90 and a Nikkor 200-500mm f/5.6E telephoto zoom lens at 500mm. The D90 is a DX format camera having a 1.5x crop factor. In other words, the DX sensor crops the outer portion of the image formed by the lens. As a result, photographs made with this camera will display an angle of view equivalent to that produced by a lens with 1.5x the actual focal length used. In the above image, the 200-500 is at 500mm but the angle of view matches that produced by a 750mm lens.

It is often said that a crop sensor camera will also produce an image having a greater depth of field. In other words, the same lens at the same focal length will produce, not just a wider angle of view when paired with a full frame camera, but also a shallower depth of field. The claim is that the DX sensor not only crops the angle of view but forces a significant increase in depth of field. That assertion is just plain wrong.

In the below test images, you’ll see side-by-side comparisons of photos made with Nikon FX (full frame) and DX (crop sensor) camera bodies. The cameras used were the full frame Nikon D610 and the DX format Nikon D90. These cameras were used with the following lenses:

  • Nikkor 200-500mm f/5.6E VR
  • Tamrom 70-200mm f/2.8 Di VC USD
  • Tamron 24-70mm f/2.8 Di VC USD

To isolate sensor size as the only variable, the comparison images were made with the lenses at the same focal length, focal ratio and at the same distance from a fixed position subject. The Nikkor 200-500mm f/5.6E and Tamron 70-200mm f/2.8 Di VC USD were mounted on a tripod in a fixed position. The Tamron 24-70mm f/2.8 Di VC USD has no tripod collar or foot. The cameras were mounted to the tripod with the tripod in the same position for each set of exposures.

To create a large enough set of images to suitably address the question, each lens was used at a multiple focal lengths:

  • Nikkor 200-500mm f/5.6E VR: 200mm, 300mm, 400mm and 500mm
  • Tamrom 70-200 f/2.8 Di VC USD: 70mm, 100mm, 135mm and 200mm
  • Tamron 24-70 f/2.8 Di VC USD: 50mm and 70mm

Each lens was used wide open at its smallest f-stop number. ISO and shutter speed were kept constant for exposures made at the same focal length with both cameras.

Why did I decide to test the notion that sensor size has a significant impact on depth of field? I performed this experiment to test my belief that that lens aperture and distance to subject are the two factors having the greatest impact on depth of field. In other words, if a lens is used at the same physical aperture and distance to make photographs of a fixed position subject with two cameras of different sensor size, the depth of field recorded in the two images should be identical or, at least, very nearly so.

If I’m correct in this belief, the images should confirm it. If I’m wrong and if crop factor needs to be applied to depth of field as well as to focal length, photos made under the above conditions should exhibit obviously different depths of field with the photo made using the full frame camera consistently displaying an obviously shallower depth of field than the photo made using the crop sensor body.

Keeping all this in mind, let’s go to the photos. Below, are ten composite images. The photo occupying the left half of each composite was made using the Nikon D610. The photo to the right of the divider was made using the Nikon D90. Since the same lens at the same focal length, f-stop and distance to subject was used to make each image in a composite, the image made with the crop sensor D90 (on the right) shows a narrower angle of view. In each composite, I’ve indicated similar sections of the two photos that, when compared, reveal both photos to have identical – or nearly so – depths of field. This conclusion is reached by comparing the relative size of the subject, a hula dancer toy, and the out of focus highlights and details in the background.

Comparison #1: Nikkor 200-500mm f/5.6E (200mm, f/5.6)

The photo to the left of the divider was made with the Nikon D610 and Nikkor 200-500mm f/5.6E at 200mm, f/5.6, ISO 400, 1/200-second. The photo on the right was made with the same lens at the same distance from subject also at 200mm, f/5.6, ISO 400, 1/200-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Nikkor 200-500mm f/5.6E at 200mm, f/5.6, ISO 400, 1/200-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 200mm, f/5.6, ISO 400, 1/200-second. (Bill Ferris)

Comparison #2: Nikkor 200-500mm f/5.6E (300mm, f/5.6)

The photo to the left of the divider was made with the Nikon D610 and Nikkor 200-500mm f/5.6E at 300mm, f/5.6, ISO 400, 1/200-second. The photo on the right was made with the same lens at the same distance from subject also at 300mm, f/5.6, ISO 400, 1/200-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Nikkor 200-500mm f/5.6E at 300mm, f/5.6, ISO 400, 1/200-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 300mm, f/5.6, ISO 400, 1/200-second. (Bill Ferris)

Comparison #3: Nikkor 200-500mm f/5.6E (400mm, f/5.6)

The photo to the left of the divider was made with the Nikon D610 and Nikkor 200-500mm f/5.6E at 400mm, f/5.6, ISO 400, 1/250-second. The photo on the right was made with the same lens at the same distance from subject also at 400mm, f/5.6, ISO 400, 1/250-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Nikkor 200-500mm f/5.6E at 400mm, f/5.6, ISO 400, 1/250-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 400mm, f/5.6, ISO 400, 1/250-second. (Bill Ferris)

Comparison #4: Nikkor 200-500mm f/5.6E (500mm, f/5.6)

The photo to the left of the divider was made with the Nikon D610 and Nikkor 200-500mm f/5.6E at 500mm, f/5.6, ISO 400, 1/250-second. The photo on the right was made with the same lens at the same distance from subject also at 500mm, f/5.6, ISO 400, 1/250-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Nikkor 200-500mm f/5.6E at 500mm, f/5.6, ISO 400, 1/250-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 500mm, f/5.6, ISO 400, 1/250-second. (Bill Ferris)

Comparison #5: Tamron 70-200 f/2.8 VC (70mm, f/2.8)

The photo to the left of the divider was made with the Nikon D610 and Tamron 70-200mm f/2.8 VC at 70mm, f/2.8, ISO 400, 1/400-second. The photo on the right was made with the same lens at the same distance from subject also at 70mm, f/2.8, ISO 400, 1/400-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Tamron 70-200mm f/2.8 VC at 70mm, f/2.8, ISO 400, 1/400-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 70mm, f/2.8, ISO 400, 1/400-second. (Bill Ferris)

Comparison #6: Tamron 70-200mm f/2.8 VC (100mm, f/2.8)

The photo to the left of the divider was made with the Nikon D610 and Tamron 70-200mm f/2.8 VC at 100mm, f/2.8, ISO 400, 1/400-second. The photo on the right was made with the same lens at the same distance from subject also at 100mm, f/2.8, ISO 400, 1/400-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Tamron 70-200mm f/2.8 VC at 100mm, f/2.8, ISO 400, 1/400-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 100mm, f/2.8, ISO 400, 1/400-second. (Bill Ferris)

Comparison #7: Tamron 70-200mm f/2.8 VC (135mm, f/2.8)

The photo to the left of the divider was made with the Nikon D610 and Tamron 70-200mm f/2.8 VC at 135mm, f/2.8, ISO 400, 1/400-second. The photo on the right was made with the same lens at the same distance from subject also at 135mm, f/2.8, ISO 400, 1/400-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Tamron 70-200mm f/2.8 VC at 135mm, f/2.8, ISO 400, 1/400-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 135mm, f/2.8, ISO 400, 1/400-second. (Bill Ferris)

Comparison #8: Tamron 70-200mm f/2.8 VC (200mm, f/2.8)

The photo to the left of the divider was made with the Nikon D610 and Tamron 70-200mm f/2.8 VC at 200mm, f/2.8, ISO 400, 1/400-second. The photo on the right was made with the same lens at the same distance from subject also at 200mm, f/2.8, ISO 400, 1/400-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Tamron 70-200mm f/2.8 VC at 200mm, f/2.8, ISO 400, 1/400-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 200mm, f/2.8, ISO 400, 1/400-second. (Bill Ferris)

Comparison #9: Tamron 24-70mm f/2.8 VC (50mm, f/2.8)

The photo to the left of the divider was made with the Nikon D610 and Tamron 24-70mm f/2.8 VC at 50mm, f/2.8, ISO 400, 1/640-second. The photo on the right was made with the same lens at the same distance from subject also at 50mm, f/2.8, ISO 400, 1/640-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Tamron 24-70mm f/2.8 VC at 50mm, f/2.8, ISO 400, 1/640-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 50mm, f/2.8, ISO 400, 1/640-second. (Bill Ferris)

Comparison #10: Tamron 24-70mm f/2.8 VC (70mm, f/2.8)

The photo to the left of the divider was made with the Nikon D610 and Tamron 24-70mm f/2.8 VC at 70mm, f/2.8, ISO 400, 1/640-second. The photo on the right was made with the same lens at the same distance from subject also at 70mm, f/2.8, ISO 400, 1/640-second. (Bill Ferris)

The photo to the left of the divider was made with the Nikon D610 and Tamron 24-70mm f/2.8 VC at 70mm, f/2.8, ISO 400, 1/640-second. The photo on the right was made with the Nikon D90, the same lens at the same distance from subject also at 70mm, f/2.8, ISO 400, 1/640-second. (Bill Ferris)

Comparing the above ten photo sets, it’s clear the photographs capture equivalent depths of field despite the fact that they’re made with full frame and crop sensor cameras. As expected, the crop sensor camera captures a more narrow angle of view. However, a comparison of the relative size of the hula dancer toy with the details of the out of focus background reveals that the DX format Nikon D90 captures the same depth of field as the FX format Nikon D610. This flies in the face of the common (but mistaken) belief that crop sensors significantly alter depth of field.

To understand the performance of each camera as illustrated in the above photos, one need only understand that photographic depth of field is largely determined by two factors: distance to subject and lens aperture. Each lens was kept at a constant position and distance from the subject for the photos made with the two camera bodies. By keeping focal length and f-stop constant in each photographic set, lens aperture was kept constant.

The f-stop number describes the ratio of lens focal length to aperture. In other words, a 200mm, f/5.6 lens has an aperture of about 36mm. This is true regardless of the size of the sensor in the camera to which the lens is attached. Here’s a listing of the focal lengths and apertures for each set of photos:

Nikkor 200-500mm f/5.6E VR

  • 36mm aperture (200mm, f/5.6)
  • 54mm aperture (300mm, f/5.6)
  • 71mm aperture (400mm, f/5.6)
  • 89mm aperture (500mm, f/5.6)

Tamron 70-200mm f/2.8 VC

  • 25mm aperture (  70mm, f/2.8)
  • 36mm aperture (100mm, f/2.8)
  • 48mm aperture (135mm, f/2.8)
  • 71mm aperture (200mm, f/2.8)

Tamron 24-70mm f/2.8 VC

  • 18mm aperture (50mm, f/2.8)
  • 25mm aperture (70mm, f/2.8)

As you review the above list, notice the constant f-stop results in increasing lens aperture as focal length increases. By keeping subject distance constant and increasing the physical aperture of the lens, depth of field becomes more shallow. By definition, the reverse is also true. With subject distance kept constant, decreasing lens aperture would result in a deeper or increased depth of field. And as illustrated by the above comparisons, keeping both subject distance and lens aperture constant produces constant depth of field. This holds true regardless of sensor size.

How is it, then, that so many photographers have come to accept the false assertion that crop sensor cameras make images having increased depth of field? The key to understanding this is the concept of equivalence. In simplest terms, equivalence describes two images made with different cameras and lens settings but having identical qualities. There are many factors that go into describing truly equivalent images. For the purposes of this discussion, we’ll focus on angle of the view and depth of field.

This set of images compares performance between crop sensor and full frame DSLR bodies. The images in the left column were made with a Nikon D90. Images in the right three columns were made with a Nikon D610. Both cameras used the same Tamron 70-200mm f/2.8 Di VC USD zoom lens, which was set up on a tripod to ensure it would not change position during the test. Both cameras used ISO 200, center point average metering and were operated in Aperture Priority. The subject in these photos is a scale model of the Lunar Excursion Module (LEM) from the Apollo program.

This set of images compares performance between crop sensor and full frame DSLR bodies. The images in the left column were made with a Nikon D90. Images in the right three columns were made with a Nikon D610. Both cameras used the same Tamron 70-200mm f/2.8 Di VC USD zoom lens, which was set up on a tripod to ensure it would not change position during the test. (Bill Ferris)

Let’s consider the above image set made with the Tamron 70-200mm f/2.8 VC. Due to its smaller sensor, a photograph made with the D90 captures a more narrow angle of view in comparison with an image made with the D610 at the same focal length. To capture an equivalent angle of view at the same distance from the subject, the D610 needs to use a greater focal length. At that increased focal length, the FX format camera will capture an angle of view equivalent to that recorded by the D90.

If both lenses are used at the same f-stop of f/2.8, their respective apertures will be about 46mm for the 130mm, f/2.8 lens on the D90 and 71mm for the 200mm, f/2.8 lens on the D610. Bear in mind, both cameras are at the same distance from the subject. Due to the larger physical aperture of the 200mm focal length lens, it records a shallower depth of field. To match the depth of field of the D90, the D610 is closed down from f/2.8 to f/4. This closes the aperture from 71mm to 50mm, which roughly matches the depth of field recorded by the D90 and its 46mm aperture.

Also, compare the quality of the out of focus background detail in the photos made with the DX format D90 (left most column) with the same detail in the second set of photos made with the FX format D610 (middle of three columns). Pay particular attention to the grouping of four bokeh balls to the left of the lunar lander model. In the D90 photos and in the equivalent D610 photos (right most column), that grouping is well defined with clear separation. In the middle column of D610 photos, that grouping is more diffuse, less well defined and not as clearly separated from the background.

This is what we would expect, considering that all the photos in that collection were made with the cameras and lenses at the same distance from the subject. The first and third column sets of images made with the D610 were made with the same lens aperture as the D90. The third column set of D610 images were made at an equivalent focal length to the D90 images. Both the angle of view and depth of field are equivalent. The first set (left column) of D610 images, while showing a wider angle of view, have equivalent depth of field as the D90 images. Again, this is exactly what one would expect given that the D90, and first and third set of D610 images were made at the same aperture, while the second set (middle column) of D610 photos were made at a larger aperture.

Another approach to producing equivalent depths of field, would have been to increase the lens aperture on the D90. The D90 would need a 130mm f/1.8 lens, which would have a 72mm aperture. That’s very nearly identical to the 71mm aperture of the 200mm, f/2.8 lens on the D610.

If equivalence is your objective, applying the crop factor to the f-stop allows you to calculate the aperture needed to make a photograph having an equivalent depth of field at a focal length delivering an equivalent angle of view. This adjustment can go either way. We can use a larger f-stop (multiply by the crop factor) to close down the aperture of the lens on the larger sensor camera or we can use a smaller f-stop (divide by the crop factor) to open the aperture of the lens on the smaller sensor camera. Either approach will produce equivalent apertures on the two cameras, which allows them to capture matching depths of field.

This is what has led so many photographers to mistakenly conclude that crop sensors significantly alter depth of field. What folks overlook is that the crop factor is applied to allow the lenses on the cameras to operate at the same physical aperture. Again, the key to understanding depth of field is recognizing that distance to subject and lens aperture are the critical factors. If you keep subject distance constant, keeping lens aperture constant will deliver equivalent depth of field. This holds true even if the lenses are used at focal length delivering non-equivalent angles of view.

Wildlife photographers often choose to shoot with crop sensor cameras to effectively bring the animals closer. They want the narrower angle of view delivered by the crop sensor. Shooting at 500mm f/4 with a DX camera will not only produce a larger image of the subject (in comparison with a photograph made using the same lens at the same distance on an FX camera), the DX camera will also record the same shallow depth of field and beautiful, buttery bokeh. That’s a huge advantage and a big reason why crop sensor cameras are so popular with sports and wildlife photographers. Of course, the smaller sensor also captures less total light with each exposure and this has implications for image noise. But that’s another blog entry.

In the meantime, armed with this new information and understanding of the role lens aperture plays in depth of field, let’s get out and shoot.

Bill Ferris | March 2016

Autofocus Fine Tune

Autofocus Fine Tune test shot for Tamron 70-200mm f/2.8 Di VC USD lens at 200mm, f/2.8, ISO 100, 1/200-second with flash and Nikon D610 AF Fine Tune set to OFF (Bill Ferris)

Autofocus fine-tune test shot for Tamron 70-200mm f/2.8 Di VC USD lens at 200mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune is turned off. (Bill Ferris)

Choosing the right autofocus (AF) mode can be a real challenge. You could leave the driving to the camera and go with Auto-servo AF (AF-A) mode. If you go that route, don’t expect that dumb box of a camera to make the right choices. It will make choices but they’ll probably not be the same choices you would make.

Being the risk-taker that you are, I’m sure you spend most of your time shooting in either Single-servo (AF-S) or Continuous-servo (AF-C) mode. These allow you greater control and, when good choices are made, a higher success rate making keeper images. Among those choices, is deciding which one or more AF points to use. Do you use one, nine, twenty-one or all the AF points on your camera’s sensor? If just one, do you go with the center point or an outer point? If you choose a group of points, which group? Do you allow the camera to have a say in which AF points are used? So many choices.

Let’s assume you’ve chosen an AF mode, and selected the number and location of the AF points that will be used. The next challenge is to successfully place at least one AF point over your subject and acquire focus. When it all comes together, it’s a beautiful moment. The shutter clicks open and the image swiftly, silently, gets encoded as a collection of 1’s and 0’s on an SD card.

Later, when you look at the photograph in Lightroom and realize it’s still not in focus, that moment of joy becomes frustration. What happened? Why is the eye just ever so slightly soft?

Of all the factors than have the potential to cause an out-of-focus image, arguably the most pernicious is a camera/lens combo that is ever so slightly miscalibrated. Despite your mastery of the camera’s AF system, your successful effort to track the subject and the presence of mind to make an exposure at the decisive moment, that slight miscalibration wreaks havoc. Focus is not set on the eye beneath the AF point. Instead, focus is slightly in front of or just behind the eye. The result is an out of focus image that ends up being deleted rather than marked as a keeper.

Autofocus fine-tune is a tool offered by many professional and high end consumer cameras. It allows you to adjust where focus is set to compensate for a miscalibrated lens. How does it work?

In the above images, the blue shaded portion of the semitransparent square overlay represents an out-of-focus area of the black and white image. The portion of the black and white photo visible within the blue shaded overlay represents the area of the face falling within the focus plane and appearing to be be in focus in the image. TOP: This illustrates a properly focused image. The eyes, brow and mouth fall within the focus plane and appear in-focus. MIDDLE: This represents a back-focused image. The ears an temples are within the focus plane and appear sharp. However, the eyes are above the focus plane and look soft. BOTTOM: This represents a front-focused image. The tip of the nose and chin fall within the focus plane and appear sharp. However, the eyes are behind the focus plane and look soft.

In the above images, the blue shaded portion of the semitransparent square overlay represents an out-of-focus area of the black and white image. The portion of the black and white photo visible within the blue shaded overlay represents the area of the face falling within the focus plane and appearing properly in-focus.
TOP: This illustrates a properly focused image. The eyes, brow and mouth fall within the focus plane and appear in-focus.
MIDDLE: This represents a back-focused image. The ears and temples are within the focus plane and appear sharp. However, the eyes are above the focus plane and look soft.
BOTTOM: This represents a front-focused image. The tip of the nose and chin fall within the focus plane and appear sharp. However, the eyes are behind the focus plane and look soft.

In the above illustration, the focus plane of the camera is represented by the semitransparent, blue square overlay. While all photographs have at least a minimal depth of field, for simplicity, I’m illustrating the focus plane as a two-dimensional, flat zone. With large aperture, small focal ratio lenses being popular for portraiture, the shallow depths of field produced by such lenses leave little margin for error when it comes to achieving accurate focus. If focus is not set on the eye or within a few millimeters of the eye, the resulting image will look “soft” and out-of-focus. There will be portions of the subject’s face that look sharp and in-focus, but if the eyes look soft, the overall impression will be that the photo is soft.

A miscalibrated camera/lens combo may give every indication of making a properly focused exposure. However, despite the fact that the focus point may be directly over the subject’s eye, the camera will set focus slightly in front of or behind the eye. If you are shooting with a fast f-stop, that slight miscalibration can result in unacceptably soft images. Autofocus fine-tune allows you to compensate for this problem.

In the Nikon D610 menu system, AF Fine Tune is found in the Setup Menu. (Bill Ferris)

In the Nikon D610 menu system, AF fine-tune is found in the Setup Menu. (Bill Ferris)

Entering the AF fine-tune menu, the first option is where you select, ON or OFF, for this control. The second setting is the Saved Value for the lens. (Bill Ferris)

Entering the AF fine-tune menu, the first setting allows you to select, ON or OFF. The second setting is the Saved Value for the lens. (Bill Ferris)

Entering the Saved Value setting, select a positive or negative number from +20 to -20. Positive numbers move the focus point farther from the focus plane to compensate for front-focused images. A negative setting moves the focus point closer to the camera focus plane to compensate for back-focused images. (Bill Ferris)

Entering the Saved Value setting, select a positive or negative number from +20 to -20. Positive numbers move the focus point away from the camera to compensate for front-focused images. A negative setting moves the focus point toward the camera to compensate for back-focused images. (Bill Ferris)

Nikon cameras recognize Nikkor lenses and many third party lenses, and are able store AF fine-tune settings for up to 12 different lenses. (Bill Ferris)

Nikon cameras recognize Nikkor lenses and many third party lenses, and are able store AF fine-tune settings for up to 12 different lenses. (Bill Ferris)

The above series of images illustrate how to use AF fine-tune to add an adjustment to compensate for a lens that consistently front-focuses or back-focuses when used with a specific camera body. AF fine-tune settings are not transferable. A setting on one camera may not be needed on a different but same model body. The setting is unique to that specific camera/lens combination.

Also, Nikon bodies do not allow you to define multiple settings for the same lens. For example, when working with a zoom lens, you are limited to one setting for that lens. If AF fine-tune is engaged, the adjustment will be applied regardless of the focal length used. I recommend you test a zoom lens at the focal length at which it will most likely be used.

The below series of images illustrate my approach to testing a lens to determine if an AF fine-tune adjustment is needed. Right click the below images to open a full-size JPEG in a new window.

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at OFF. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune turned off. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at +2. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at +2. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at +4. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at +4. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at +6. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at +6. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at +8. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at +8. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at +10. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at +10. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at -2. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at -2. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at -4. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at -4. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at -6. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at -6. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at -8. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at -8. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF Fine Tune at -10. (Bill Ferris)

Photo made with Nikon D610 and Tamron 24-70mm f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 100, 1/200-second with flash. AF fine-tune at -10. (Bill Ferris)

The above series of images is a real world test under real world conditions. When shooting portraiture with the D610 and Tamron 24-70 f/2.8 Di VC USD, I typically shoot wide open with a mix of ambient light and flash at 1/200-second. If you’re going to test a lens to determine an appropriate AF fine-tune setting, test the lens under the same conditions in which it will most likely be used.

AF fine-tune is turned off for the first image in the series. The next ten images were taken with AF fine-tune turned on. A +2 adjustment is applied in the second image. Images three through six have adjustments of +4, +6, +8 and +10 applied, respectively. A -2 adjustment has been applied to image seven in the series. The next four images have adjustments of -4, -6, -8 and -10 applied, respectively. At each setting, I took five handheld exposures with vibration compensation (VC) engaged. The above series includes the second exposure in each five-exposure set.

Reviewing the exposures at 1:1 in Lightroom, all five exposures with AF fine-tune turned off were acceptably sharp at the focus point. Two of the five in that set were a bit shallow in focus, displaying minimal in-focus depth of field in front of the focus point. The set which most consistently produced sharp images with good depth of field both in front of and behind the focus point is the set with an adjustment of -6 applied.

Now, it gets complicated. Normally, I would choose the -6 setting for the Tamron 24-70mm f/2.8 VC and leave it at that. However, I also have a Tamron 70-200mm f/2.8 Di VC USD lens but the Nikon firmware does not distinguish between it and the 24-70mm f/2.8 VC. If I leave AF fine-tune turned on with a -6 setting for the 24-70mm f/2.8, the same adjustment will be applied when the 70-200mm f/2.8 is mounted on the D610. So, I’ve also tested the Tamron 70-200mm, using the same approach as with the shorter zoom.

The results of the testing with the Tamron 70-200mm f/2.8 VC were fairly straightforward. The best set of images was taken with AF fine-tune turned off. The set taken with an AF fine-tune adjustment of -6 were among the worst of the lot.

After testing both lenses, I’ve decided to store a -6 adjustment for the Tamron lenses but to leave AF fine-tune turned off. Both lenses make sharp, usable images without an AF fine-tune adjustment. If I remember to activate AF fine-tune when the 24-70 VC is mounted, so much the better.

Now, it’s time to get out and shoot.

Bill Ferris | November 2015

Nikon 200-500mm f/5.6E – Short Term Review

The Nikon AF-S 200-500mm f/5.6E ED VR Zoom Lens

The Nikon AF-S 200-500mm f/5.6E ED VR Zoom Lens (Bill Ferris)

In August 2015, Nikon announced three new lenses that would soon be available to the photographic community. Introduced that summer day were the AF-S 24-70mm f/2.8E ED VR, the AF-S 24mm f/1.8G ED and the AF-S 200-500mm f/5.6E ED VR.

The featured player of this trio was the eagerly anticipated refresh of Nikon’s well-regarded AF-S 24-70mm f/2.8G ED zoom lens. The 24-70 f/2.8G is a popular wide angle zoom among both professional and enthusiast photographers. It is considered by many wedding and portrait photographers to be among the Holy Trinity of fast Nikon zooms, including the 14-24mm f/2.8G ED and the 70-200mm f/2.8G ED VR II. The new lens, the AF-S 24-70mm f/2.8E ED VR features Nikon’s electronic aperture mechanism and also adds vibration reduction (VR) technology to the venerable optic.

The biggest surprise of the day – in more ways than one – was Nikon’s introduction of the AF-S 200-500mm f/5.6E ED VR telephoto zoom lens. What made this lens so surprising were its focal length range and price. Nikon and Canon are known around the world as the leading manufacturers of telephoto lenses for professionals and serious amateurs. From the 200mm f2 to the 800mm f/5.6, Nikon’s line of fast long focal length primes are coveted by sports, wildlife and action photographers. Two professional grade zooms, the AF-S 80-400mm f/4.5-5.6G ED VR and AF-S 200-400mm f/4G ED VR II, bring zoom flexibility to the system.

These are professional quality lenses and priced, accordingly. With a manufacturer’s suggested retail price of about $2,700 US, the 80-400mm f/4.5-5.6G is the least expensive of the bunch. The fast primes are priced at from $6,000 to $17,900 US. The 200-400mm f/4G weighs in at a hefty $7,000 US.

By contrast, the new 200-500mm f/5.6E is priced to be accessible to the consumer: just under $1,400 US. The zoom range and constant aperture suggest this lens was designed and released to compete directly with consumer-priced zooms manufactured by Tamron and Sigma. Tamron introduced the 150-600mm f/5-6.3 Di VC USD in November 2013. Priced at about $1,100 US, the Tamron 150-600 brought quality long telephoto zoom performance squarely within reach of the enthusiast photographer. While sports shooters balked at the relatively slow aperture range, wildlife photographers lined up to add this new lens to their arsenals.

Less than a year later in September 2014, Sigma entered the fray introducing two 150-600mm f/5-6.3 telephoto zooms. They were labeled “Contemporary” and “Sports.” The 150-600mm f/5-6.3 DG OS HSM Contemporary was introduced at about $1,100 US and had the Tamron zoom squarely in its sites. Though the highest priced of the trio at about $2,000 US, the Sigma 150-600 f/5-6.3 DG OS HSM Sports is still well under the entry level fee for a high end Nikon or Canon zoom.

I spent the better part of a year contemplating whether or not I should add one of these three lenses to my collection. My growing interest in sports and wildlife photography had created a need for more reach in my lens collection. The Tamron and Sigma zooms certainly addressed that interest. However, their relatively slow focal ratios introduced just enough hesitation that I never pulled the trigger to place an order. Then, Nikon’s August 2015 announcement happened.

Within 48-hours, I had done something that was a first for me: pre-ordered a lens. I’ve never been much of a first adopter of tech. Rather than live on the bleeding edge of consumer technologies, I generally prefer to stand back, observe and wait for good deals to emerge on established quality kit. The Nikon AF-S 200-500mm f/5.6E ED VR, however, is a different story.

The Nikon 200-500mm f/5.6E, Tamron 150-600 f/5-6.3 Di VC USD, Sigma 150-600 f/5-6.3 DG OS HSM Contemporary and Sports lenses are shown above in their comparative sizes.

The Nikon 200-500mm f/5.6E, Tamron 150-600 f/5-6.3 Di VC USD, Sigma 150-600 f/5-6.3 DG OS HSM Contemporary and Sports lenses are shown above in their comparative sizes.

I have to be honest, the Nikon name immediately intrigued me. I’m a Nikon shooter, having owned five Nikon camera bodies and numerous lenses over the last 25 years. When I placed the pre-order, I did so trusting that Nikon would deliver a quality product. Time will tell if that is the case.

Setting aside brand loyalty, there were several performance specifications that also caught my attention. The first and most immediate was the 200mm to 500mm focal length zoom range. At the short end this lens picks up where the excellent Tamron 70-200mm f/2.8 Di VC USD leaves off. At the long end of 500mm, the lens offers more than enough reach for quality sports photography and also for wildlife. The constant f/5.6 aperture through the full zoom range makes this lens a half-stop faster than the Tamron and Sigma zooms. It may not seem like much but that difference in light-gathering means my Nikon D610 camera should be able to use all 39 autofocus points at any focal length. At f/6.3, the D610 starts dropping the outermost AF points.

Another intriguing feature was the latest generation VR technology packaged with this lens. Nikon describes the 200-500 f/5.6E as being capable of delivering up to 4.5 stops of vibration reduction. The general rule of photography has, for generations, been that a photographer using good handholding technique should get sharp results using a shutter speed of 1/focal length. In the case of a 500mm lens, a 1/500-second exposure should not require VR. (This is not to say that VR would not aid a handheld exposure at that speed, merely that good handholding technique with a 500mm at 1/500-second should produce a sharp image.) A 4.5 stop improvement with VR translates to a minimum exposure time of between 1/20- and 1/30-second. That’s amazing!

An MTF chart showing the theoretical performance of the Nikon AF-S 200-500mm f/5.6E at 200mm f/5.6. (courtesy Nikon Corporation)

A Modulation Transfer Function (MTF) chart showing the theoretical performance of the Nikon AF-S 200-500mm f/5.6E at 200mm f/5.6. The industry standard practice is that MTF charts display computer-modeled performance characteristics based on lens design. (courtesy Nikon Corporation)

An MTF chart showing the theoretical performance of the Nikon AF-S 200-500mm f/5.6E at 500mm f/5.6. (courtesy Nikon Corporation)

A MTF chart showing the theoretical performance of the Nikon AF-S 200-500mm f/5.6E at 500mm f/5.6. (courtesy Nikon Corporation)

The above MTF (Modulation Transfer Function) charts illustrate the theoretical performance of the Nikon AF-S 200-500mm f/5.6E ED VR zoom lens. The top chart illustrates theoretical performance of the lens at 200mm f/5.6 while the bottom chart shows theoretical performance at 500mm f/5.6. Interpretations of MTF charts are always at least somewhat subjective. That said, I believe a reasonably objective translation would be as follows:

The red lines illustrate contrast performance while the blue lines illustrate resolution performance. The vertical scale measures performance in both areas with better performance being higher on the scale. The horizontal scale measures distance from the center of the lens. At 200mm f/5.6, the lens should deliver excellent contrast (0.9 or higher) across the entire angle of view. Resolution should also be excellent from the center to roughly two-thirds the distance to the edge of the angle of view. Very good resolution performance can be expected across much of the rest of the angle of view with good performance at the very edge. At 500mm, f/5.6, the lens continues to deliver excellent contrast performance across the full angle of view. The slight separation of the sagittal (solid) and meridional (dashed) lines suggests a subtle though largely imperceptible loss of contrast. Resolution performance continues to be excellent at 500mm, f/5.6 across half the angle of view and remains very good to the edge of the field. The separation of sagittal and meridional lines suggests a possible though subtle astigmatism. This lens should control for chromatic aberration, quite well.

The excellent theoretical performance of the lens was the deal-maker for me, giving real confidence in the decision to pre-order. Then, the waiting began.

The Nikon AF-S 200-500mm f/5.6E ED VR zoom lens fully extened to 500mm with the lens hood attached.

The Nikon AF-S 200-500mm f/5.6E ED VR zoom lens fully extended to 500mm with the lens hood attached. (Bill Ferris)

On the evening of September 23, UPS delivered my copy of the Nikon AF-S 200-500mm f/5.6E ED VR zoom lens. It was too late on that day to do much more than record an unboxing video for my YouTube channel and take a few photos of the new lens. A month has now passed during which time I have made a bit more than 2,600 exposures with the 200-500. What follows, is a Short Term Review based on the first month’s use. This isn’t a final review and, despite having formed some strong initial impressions, will not include any final conclusions. This review will include my initial observations about the performance of the lens and my own development as a photographer working at super telephoto ranges.

I’ll begin with the vital statistics:

  • Length at 200mm (no lens hood; no lens caps): 10 1/2″
  • Length at 200 mm (w/ lens hood): 14″
  • Length at 500mm (no lens hood; no lens caps: 13 1/2″
  • Length at 500mm (w/ lens hood): 17″
  • Diameter (front of lens): 4″
  • Circumference (front of lens): 13″
  • Diameter (front of lens with lens hood): 5 1/8″
  • Circumference (front of lens hood): 16 1/2″
  • Weight (w/ lens hood, lens caps, tripod collar): 5 lbs. 6.5 oz (86.5 oz.)
  • Weight (w/ lens hood, tripod collar): 5 lbs. 5.0 oz. (85.0 oz)
  • Weight (w/ tripod collar): 5 lbs. 1 oz. (81.0 oz)
  • Weight (w/ tripod collar and Oben mounting plate): 5 lbs. 2.5 oz (82.5 oz)
  • Weight of Lens only (no tripod collar, no lens hood, no lens caps): 4 lbs. 10.0 oz. (74.0 oz.)
  • Weight of tripod collar: 7.0 oz.
  • Lens Hood dimensions: 3 3/4″ length x 5 1/8″ diameter
  • Weight of lens hood: 4.0 oz.
Controls on the side of hte Nikon 200-500mm f/5.6E. (Bill Ferris)

Controls on the side of the Nikon 200-500mm f/5.6E. (Bill Ferris)

The left side of the lens is where you will find the various controls:

  • M/A – M: Autofocus switch. In M/A, lens autofocuses with instantaneous manual focus override as an available option. In M, the lens manually focuses, only.
  • FULL / ∞ to 6m: When focusing on subjects nearer than 6 meters (20 feet) distant, set to FULL. When focusing on subjects at greater than 6 meters distance, set to ∞ to 6m.
  • VR On / VR Off: Vibration Reduction (VR) On/Off switch. VR should not be turned on until camera body is on. VR should be turned off before camera body is turned off.
  • NORMAL / SPORT: With VR on, you may choose either NORMAL or SPORT mode. In SPORTS mode, Nikon VR recognizes a panning motion and compensates for camera shake while preserving intended motion blue due to panning.
  • Lock 200: This switch locks the lens at a 200mm focal length during transportation and storage. With the lock disengaged, the lens may be zoomed to any point in the focal length range.
This photo shows the Nikon F-mount flange on the 200-500 f/5.6E lens. Notice the rubber gasket which provides a seal between the lens and camera body for protection from weather and the elements. The lens also features a rubberized ring at the front of the lens, also for weather sealing. (Bill Ferris)

This photo shows the Nikon F-mount flange on the 200-500 f/5.6E lens. Notice the rubber gasket which provides a seal between the lens and camera body for protection from weather and the elements. (Bill Ferris)

The rubberized seal around the front of the Nikon 200-500mm f/5.6E ED VR provides both protection for the front lens element and a measure of weather sealing from the elements. (Bill Ferris)

The rubberized seal around the front of the Nikon 200-500mm f/5.6E ED VR provides both protection for the front lens element and a measure of weather sealing from the elements. (Bill Ferris)

After shooting with this lens for a bit longer than one month, I would describe the construction and controls as of good to very good quality. The collapsed lens feels hefty and solid in the hands. There is plenty of plastic in the external shell but the lens does not feel, cheap. There are no odd internal sounds when shaking the lens, and not clicking or grinding sounds when rotating either zoom or focus. The tripod collar is sturdy with the mounting foot serving perfectly as a handle when carrying just the lens.

The zoom ring, located near the end of the lens, is rubberized and has smooth motion with just the right degree of tension. I would describe the sound made by the rotating zoom ring as smooth zippy. The throw (angle of rotation through the complete zoom range) is fairly long at approximately 155 degrees and this makes it difficult to quickly zoom from one end of the range to the opposite. The focus ring, located near the back of the lens just in front of the control cluster has a hard plastic feel and loose rotation action. It makes a whispery sound when rotated and has a throw of about 190 degrees. I typically shoot with the lens focus control set to M/A (Auto with instantaneous manual override) and have not had any instances where I unintentionally brushed against or rotated the focus ring to lose focus.

The lens hood and soft case that ship with the Nikon 200-500mm f/5.6E are cheap, low quality items. The lens hood is functional, at best, while the soft case is of marginal value unless repurposed to something other than its intended task. (Bill Ferris)

The lens hood and soft case that ship with the Nikon 200-500mm f/5.6E are cheap, low quality items. The lens hood is functional, at best, while the soft case is of marginal value unless repurposed to something other than its intended use. (Bill Ferris)

The 200-500mm f/5.6E ships with a lens hood and soft case. These are, quite frankly, fairly cheap low quality items. The lens hood locks in place with a quarter turn. It is not a firm, confident lock. Rather, the hood issues a soft click when locked in position and can be easily rotated to unlock. There have been a couple of occasions when I’ve inadvertently bumped the lens hood enough to either rotate it or flex it just enough to loosen the connection. The soft case is just that. The only padding is a thin sheet at the bottom of the case.

Just a couple of weeks after the lens started shipping, Nikon Europe announced a firmware upgrade to address and correct a bug in the lens’ autofocus performance. In summary, when simultaneously engaging autofocus while zooming, autofocus will occasionally shift to manual mode. Autofocus can be restored by releasing the shutter, AF-ON or AE-L/AF-L button and then re-engaging so, this is not a catastrophic issue. I would describe it as an annoyance. In online discussion forums, some photographers have questioned the value of the firmware upgrade saying they never simultaneously zoom while engaging autofocus.

Others, myself among them, say the technique is one they employ on a more or less regular basis. When photographing sports or wildlife, I will often adjust zoom and focus, simultaneously, in order to maintain both good composition and focus while tracking a fast-moving subject. Rather than wait for Nikon to send me a personalized invitation, I visited the Nikon USA website and found their statement about the firmware upgrade. Nikon treats this, not as a service under warranty issue, but rather as an optional upgrade which is available to their US customers. Nikon paid for expedited 2nd day shipping to and from their Los Angeles facility. The lens was in their possession for two business days and Nikon kept me informed via email of the status of the work being done.

UPS delivered the upgraded lens on October 15. The following morning, I tested the autofocus performance by using back button focus to keep AF engaged while simultaneously panning and zooming between two trees in my backyard. Autofocus continued to work while I panned and zoomed from one tree to another more distant tree, repeating this motion twenty times.

The autofocus bug continues a trend for Nikon of shipping new products with performance issues. It is a problem that dates back at least to 2012, including the D800/D800E camera bodies (2012-left side autofocus), D600 body (2012- dust and oil on sensor), D750 body (2014-dark banding when shooting backlit subjects), D810 body (2014-bright spots in image during long exposures), 24-70mm f/2.8E ED VR zoom lens (2015-shipping date delayed) and now the 200-500mm f/5.6E. It is an annoying and disturbing development for a company that used to be known for producing and delivering high quality products. Nikon has now developed a reputation of poor quality control during product development and of using early adopting customers as beta testers. If there is a silver lining in this, it is that Nikon has been more proactive and acknowledging and responding to problems with new products over the last year or so.

With the tripod collar locking mechanism loosened, rotate the collar until the indicator with the carrot is aligned with both the F-mount indicator dot and the collar alignment indicator on the lens. In this orientation, the collar should slide easily off the back of the lens. (Bill Ferris)

With the tripod collar locking mechanism loosened, rotate the collar until the indicator with the carrot is aligned with both the F-mount indicator dot and the collar alignment indicator on the lens. In this orientation, the collar should slide easily off the back of the lens. (Bill Ferris)

If you are unfamiliar with Nikon tripod collars, figuring out how to remove the collar from the tripod can be a bit confusing. The collar is not hinged and does not open fully for removal. Rather, when the locking mechanism is loosened, the collar open just enough to slide over the back of the lens. However, the collar features an interior channel which slides over four locking screws on the lens. To align the locking screws with openings in the collar channel, rotate the loosened collar until the indicator with the carrot is aligned both with the F-mount indicator dot and with the collar alignment indicator on the camera. With the collar rotated as shown in the above photo, it should slide easily off the back of the lens.

Well, now that the housekeeping is taken care of, let’s focus on the central question: is the AF-S 200-500mm f/5.6E ED VR lens a quality optic? Does it, for want of a better metaphor, punch above its weight class to deliver performance exceeding what one typically gets when shooting with a sub-$1,500 telephoto zoom? Let’s look at some sample photos. Full-sized JPEG’s of the below images are available for viewing by right-clicking on the image.

A coot shakes off pond water at Raymond County Park in Kachina Village, Arizona. This photo was taken with the Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 1400, 1/100-second. It has been cropped and processed in Adobe Lightroom to taste. (Bill Ferris)

A coot shakes off pond water at Raymond County Park in Kachina Village, Arizona. This photo was taken with the Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 1400, 1/100-second. It has been cropped and processed in Adobe Lightroom to taste. (Bill Ferris)

A Eurasian Eagle Owl stands stoically on its perch during a raptors show at Flagstaff Arboretum. This photo was taken with the Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 4000, 1/500-second. It has been processed to taste in Adobe Lightroom. (Bill Ferris)

A Eurasian Eagle Owl stands stoically on its perch during a raptors show at Flagstaff Arboretum. This photo was taken with the Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 4000, 1/500-second. It has been processed to taste in Adobe Lightroom. (Bill Ferris)

A waning gibbous Moon hangs silently over Flagstaff on a mid-autumn night. This photo was taken with the Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 400, 1/1250-second. It has been cropped processed to taste in Adobe Lightroom. (Bill Ferris)

A waning gibbous Moon hangs silently over Flagstaff on a mid-autumn night. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 400, 1/1250-second. It has been cropped processed to taste in Adobe Lightroom. (Bill Ferris)

A Weber State running back sprints to the right during a game against Northern Arizona in the J. L. Walkup Skydome. This photo was taken with the Nikon D610 and 200-500mm f/5.6E at 400mm, f/5.6, ISO 6400, 1/200-second. It has been cropped processed to taste in Adobe Lightroom. (Bill Ferris)

A Weber State running back sprints to the right during a game against Northern Arizona in the J. L. Walkup Skydome. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 400mm, f/5.6, ISO 6400, 1/200-second. It has been cropped processed to taste in Adobe Lightroom. (Bill Ferris)

A dark-eyed junco sits perched on a tree branch in Raymond County Park in Kachina Village, Arziona. This photo was taken with the Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 2800, 1/1000-second. It has been cropped processed to taste in Adobe Lightroom. (Bill Ferris)

A dark-eyed junco sits perched on a tree branch in Raymond County Park in Kachina Village, Arziona. This photo was taken with the Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 2800, 1/1000-second. It has been cropped processed to taste in Adobe Lightroom. (Bill Ferris)

A monarch butterfly rests momentarily atop a New Mexico thistle flower at Logan's Crossing near Flagstaff, Arizona. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 400, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

A monarch butterfly rests momentarily atop a New Mexico thistle flower at Logan’s Crossing near Flagstaff, Arizona. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 400, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

Cheerleaders celebrate a Northern Arizona touchdown during a college football game at the J. L. Walkup Skydome in Flagstaff, Arizona. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 8063, 1/500-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

Cheerleaders celebrate a Northern Arizona touchdown during a college football game at the J. L. Walkup Skydome in Flagstaff, Arizona. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 8063, 1/500-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

American Coots casually scan for snacks in a Kachina Village pond. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 3600, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

American Coots casually scan for snacks in a Kachina Village pond. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 3600, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

Weber State quarterback, Jadrian Clark, stretches toward the goal line late in the 3rd quarter of a game against Northern Arizona in the J. L. Walkup Skydome. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 480mm, f/6.3, ISO 8063, 1/500-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

Weber State quarterback, Jadrian Clark, stretches toward the goal line late in the 3rd quarter of a game against Northern Arizona in the J. L. Walkup Skydome. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 480mm, f/6.3, ISO 8063, 1/500-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

A third quarter Moon as seen on an October night in northern Arizona. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 900, 1/800-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

A third quarter Moon as seen on an October night in northern Arizona. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 900, 1/800-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

A dark-eyed junco in Raymond County Park in Kachina Village, Arizona. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 3600, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

A dark-eyed junco in Raymond County Park in Kachina Village, Arizona. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 3600, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

An Abert squirrel gnoshes on pine nuts in a northern Arizona Ponderosa pine tree. This photo was made with a Nikon D610 and 200-500mm f/5.6 at 480mm, f/5.6, ISO 1400, 1/125-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

An Abert squirrel gnoshes on pine nuts in a northern Arizona Ponderosa pine tree. This photo was made with a Nikon D610 and 200-500mm f/5.6 at 480mm, f/5.6, ISO 1400, 1/125-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

A peregrine falcon sits calmly on the arm of a volunteer during a raptor show at the Arboretum at Flagstaff. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 3200, 1/500-second. It has been processed to taste in Adobe Lightroom. (Bill Ferris)

A peregrine falcon sits calmly on the arm of a volunteer during a raptor show at the Arboretum at Flagstaff. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 3200, 1/500-second. It has been processed to taste in Adobe Lightroom. (Bill Ferris)

A Eurasian Eagle Owl watches visitors from its perch during a raptors show at the Arboretum at Flagstaff. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 2800, 1/500-second. It has been processed to taste in Adobe Lightroom. (Bill Ferris)

A Eurasian Eagle Owl watches visitors from its perch during a raptors show at the Arboretum at Flagstaff. This photo was taken with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 2800, 1/500-second. It has been processed to taste in Adobe Lightroom. (Bill Ferris)

After my first month shooting with the AF-S 200-500mm f/5.6E ED VR telephoto zoom, I find the lens to be very sharp, delivering crisp detailed images of nature and wildlife.  If you open the above image of the Eurasian eagle owl (the last in the sequence) in a new tab and zoom in, you’ll see my silhouetted form clearly defined in the owl’s pupil. You’ll see similar results in the full-size JPEG images of the peregrine falcon and in the first photograph of the Eurasian eagle owl.

The detail in the lunar photos is very sharp. At 500mm, the lens easily resolves craters of approximately 10 kilometers diameter and partially resolves 1 kilometer wide craters on the Moon’s surface. Details such as bright ejecta rays and dark maria are also easily discerned. Chromatic aberration along the lunar limb is negligible and quite easily eliminated with the click of a button in Lightroom.

Check out the detail in the Abert’s squirrel photo. I shot this from a forest path with the squirrel about 30 feet up in a tree. Focus is on the squirrel’s hind leg but, at f/5.6, there is enough depth of field that the eye is acceptably sharp. The best detail in this image is in that hind leg, in the toes, claws and padding on the bottom of the foot. And check out the small bit of green – a freshly sprouted branch – on the bark below the squirrel’s bushy tail.

The photos of the dark-eyed junco show good focus on the eye, fine detail in the feathers and a very pleasing creamy bokeh. This lens handles background blur in a wonderful manner. The bokeh is smooth and soft, and more than adequate to create the desired separation between the subject and background. The junco photos were made from a distance of about 50 feet. The photos of the American coots were made at various distances, ranging from about 20 feet to a greatest distance of nearly 80 feet. The eyes and water droplets are crisp and well-defined. The feathers show good detail and texture. When you consider this high level of performance is made available in a lens priced thousands less than the Nikon telephotos that most closely compete with it in terms of sharpness, contrast and general image quality, the 200-500mm f/5.6E is truly an astounding value.

If you can’t make outstanding images with this lens, it’s not the lens’ fault.

With 12-seconds left in regulation, NAU's Dan Galindo hauls in a Jordan Perry pass to score the game-winning touchdown

With 12-seconds left in regulation, NAU’s Dan Galindo hauls in a Jordan Perry pass to score the game-winning touchdown. This photo was made with a Nikon D610 and Tamron 70-200 f/2.8 Di VC USD lens at 70mm, f/2.8, ISO 8063, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

The photos from the football game illustrate the most significant limitations of the lens. Those are its limited – in comparison with high end professional telephoto primes and zooms – light gathering ability and less-than-nimble autofocus performance. Let’s talk first about the light-gathering ability of the 200-500mm f/5.6E lens.

The game was played in the J. L. Walkup Skydome on the campus of Northern Arizona University. This is not a well-lit venue. The above photo of a game-winning touchdown reception was taken during a 2014 game in the Skydome. Shooting with a Tamron 70-200mm f/2.8 Di VC USD lens at 70mm f/2.8, my Nikon D610 camera body used ISO 8063 (Hi 0.3) to make a properly exposed image at 1/1000-second. This should give you an idea of the generally dim light level  (for photography) in this venue.

The 200-500mm f/5.6E delivers a constant f/5.6 focal ratio, which is two full stops slower than an f/2.8 lens. To manage the ISO and retain a minimal degree of noise-free clarity, I chose to use exposures ranging from 1/200-second to 1/500-second. Shooting at 1/200 to 1/500-second won’t come close to freezing the action of a college football game. The ISO’s chosen by the D610 at these exposure lengths generally ranged from ISO 6400 to ISO 8063 (Hi 0.3).

Starting about midway into the 3rd quarter, I shot with the 200-500 from the north end zone and photographed the action until midway through the 4th quarter. I would describe the autofocus performance as good but not impressive. This is not a lightning fast focusing lens.

I also need to acknowledge that my long telephoto lens skills are still in development. Prior to getting the 200-500, my longest lens had been the Nikon AF-S 70-300 f/4.5-5.6 ED VR. This is a consumer quality telephoto zoom. It is not impressively sharp but does offer good reach at a reasonable price. It’s also nicely portable and lightweight. In July 2015, I used the 70-300 to photograph a battle between two bison bulls for herd dominance on the North Rim of Grand Canyon. It was an exhilarating moment and the lens performed, well. However, it was that experience that got me seriously thinking about adding a long telephoto zoom to my kit. The 300mm maximum reach just wasn’t enough for that moment.

The Nikon AF-S 200-500mm f/5.6E ED VR lens mounted to an Oben CTM-2500 monopod and VH-R2 monopod tilt head. (Bill Ferris)

The Nikon AF-S 200-500mm f/5.6E ED VR lens mounted to an Oben CTM-2500 monopod and VH-R2 monopod tilt head. (Bill Ferris)

Anticipating the size, weight and magnification of the 200-500 would exceed my capacity for handholdable comfort, I purchased an Oben model CTM-2500 carbon fiber monopod to support the lens. Pictured above, is the Nikon lens mounted to the Oben monopod and VH-R2 monopod tilt head. I’ve used this combination extensively during this first month of ownership and I have to admit the monopod was a great investment. It’s carbon fiber construction makes the monopod very light, weighing in at just 1 lb. 10 oz with the attached VH-R2 head. It is a five-section design which collapses to a respectable and compact 19 3/4″ length including the tilt head. Every photo in this article taken with the 200-500 was made with the lens mounted to the Oben monopod.

There is one major criticism I have of the Oben CTM-2500 monopod. I don’t like the mounting plate that comes with the VH-R2 tilt head. It is not a standard size plate. As a result, I can’t attach a Peak Design mounting plate to the 200-500’s tripod collar foot. Also, the Oben mounting plate has a spring-loaded second pin that doesn’t have a matching companion hole in most tripod collar feet. The bottom of the 200-500’s tripod collar foot is lined with channels that provide some degree of purchase for the Oben pin. However, after a few days, the Oben plate inevitably becomes loose enough that I have to tighten the primary 1/4×20 threaded bolt to establish a secure connection.

One significant area of personal development over the first month of ownership of this lens has very little to do with photography. It is simply the challenge of becoming comfortable handling a lens of this size and weight. It’s only been in the last week or so that I’ve started feeling at ease carrying and handling the lens. It is much larger and heavier than any other lens I’ve owned or used. During the first few weeks of ownership, I was constantly worried about banging it against a wall, into a door frame or even hitting a person.

I’m also developing the ability to get close to wildlife. The challenge is to get as close to your subject as possible without encroaching such that your presence causes unnatural behaviors in the animal. Getting close is as much an art form as a skill. It requires a knowledge and skill set that has nothing, per se, to do with photography. It has everything to do with being invisible and/or perceived as a non-threat to the animal.

Once in position, achieving good results comes down to your skill in employing basic and advanced techniques of doing photography at super telephoto ranges. While the 500mm reach of the new lens has allowed me to achieve images I could previously only have imagined, I am not yet fully comfortable working at such a long focal length. This lens challenges my ability to anticipate and follow action, maintain good composition and employ good focusing technique. The margin of error in these areas is much wider when using shorter focal lengths. When working at 300mm, 400mm or more, precision in composition, tracking and technique is essential. While my skill and comfort working with this zoom range is improving, I am not yet where I want to be.

Weber State prepares to snap the ball from the 2-yard line, late in a game against host Northern Arizona. (Bill Ferris)

Weber State prepares to snap the ball from the 1-yard line, late in a game against host Northern Arizona. This photo was made with a D610 and the 200-500mm f/5.6E at 500mm, f/6.3, ISO 8063, 1/500-second. (Bill Ferris)

One photographic skill that is critical to successful photography at super telephoto lengths, is autofocus technique. I have experimented with a variety of modes available on the D610 body. I always use AF-C mode when photographing moving subjects and have been hopping about between single-point, 9-point and 3D modes. Depending on the situation, each offers its own advantages. I’m also experimenting with AF settings defining the length of time the lens will hold focus before resetting.

This brings me to a comment about the most-cited weakness of Nikon’s newest super telephoto zoom; its “poor” autofocus performance. This is, according to experts in online fora, the biggest weakness of the lens. Many of the self-appointed experts haven’t shot with the 200-500 and are relying on the comments of their favorite expert photographer…typically, a photographer who expresses a view they’ve predetermined to be correct. As mentioned previously in this review, the 200-500 does not have lightning fast autofocus. Nonetheless for many photographers, the biggest limitation impeding the quality of results achieved with this lens will be their own lack of experience working at such long focal lengths. Before blaming the lens, be sure it isn’t your own poor technique that costs you the cover of National Geographic.

Since I’ve only been using the lens a month and am still learning to master the challenges that come with shooting at super telephoto range, I’m going to suspend my final judgement on the AF performance of the 200-500 until I’ve eliminated user error as a significant contributing factor. I know for a fact that my own poor technique has cost me potentially good shots. When those instances have been eliminated – or at least, nearly so – I’ll be in a better position to comment with some degree of expertise on the inherent AF performance of this lens.

An American coot dips its beak into the Raymond County Park pond in search of a snack. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 1400, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

An American coot dips its beak into the Raymond County Park pond in search of a snack. This photo was made with a Nikon D610 and 200-500mm f/5.6E at 500mm, f/5.6, ISO 1400, 1/1000-second. It has been cropped and processed to taste in Adobe Lightroom. (Bill Ferris)

And with that, I’ll bring this Short Term Review to a close. These are my thoughts on the Nikon AF-S 200-500mm f/5.6 E ED VR lens after one-month’s ownership and use. As my time and experience with this lens increases, I will return to this blog with additional observation and thoughts on this super telephoto zoom. For now, I would sum up my observations and impressions, as follows:

The 200-500mm f/5.6E is fantastically sharp, wide open at 500mm and delivers outstanding VR performance. Priced at just under $1,400 US, this lens does not have the equivalent build quality or autofocus performance of the top professional Nikon telephoto primes and zooms. That said, this lens is an incredible value and can be a tool helping to elevate your wildlife, nature and outdoor sports photography to new levels.

Now, get out and shoot!

Bill Ferris | November 2015

What the f/#?

The Tamron 70-200 f/2.8 Di VC USD zoom lens has a focal ratio of f/2.8. This defines the largest aperture the lens is capable of having at all focal lengths throughout the zoom range. Operating at f/2.8, the focal length selected will be 2.8X the size of the aperture. While the focal length range is 70-200mm, the range of largest apertures is 25mm at a 70mm focal length to 71mm at 200mm focal length.

The Tamron 70-200 f/2.8 Di VC USD zoom lens has a constant focal ratio of f/2.8. This defines the largest aperture the lens will have throughout the zoom range. Operating at f/2.8, the focal length selected will be 2.8X the aperture. With a focal length range of 70-200mm, the widest aperture varies from 25mm at a focal length of 70mm to 71mm at a 200mm focal length. (Bill Ferris)

Let’s nerd out with some tech talk. Let’s chat about focal ratio.

Focal ratio is a rarely seen or heard phrase in online photography blogs and forums, which is surprising when you consider the important role focal ratio plays in photography. Focal ratio describes the size of a lens’s focal length relative to its aperture. It is typically expressed as an f-number, such as f/2.8. Ironically, when photographers start talking about lens aperture, it’s more than likely they’re actually discussing focal ratio. Let’s see if we can sort all this out.

We’ll begin at the beginning. Focal length is typically the first number mentioned when describing a lens. A 50mm lens has a focal length of, wait for it…50mm or roughly two inches. One may be inclined to think focal length is the distance from the front of the lens to the back, but it’s not. Focal length is the distance from the optical center of the lens to the image plane (film or sensor) where the image is formed. The optical center is usually inside the lens and is sometimes referred to as the point of convergence; the point where two light rays converge and cross.

The above diagram shows a cross section of the Nikkor 50mm f/1.4 lens. The focal length of the lens is 50mm, which is measured from the optical center of the lens to the image plane at the sensor.

The above diagram shows a cross section of the Nikkor 50mm f/1.4 lens. The focal length of the lens is 50mm, which is measured from the optical center of the lens to the image plane at the sensor.

Focal length determines how much the image is magnified. This is typically described as the angle of view produced by the lens. A 50mm lens produces a 47° (on a diagonal) angle of view at the image plane of a 35mm camera body. A 24mm lens delivers an 84° angle of view and a 200mm lens presents a 12° angle of view. Since the angle of view produced by a 50mm lens is similar to that of normal vision, it is known in 35mm photography as a normal lens. 24mm is a wide angle focal length and a 200mm is a telephoto lens.

Of course, 35mm is just one of many photographic formats. A photographic format is defined by the physical size of the medium used to record the image. In film photography, 35mm describes the length of the long side of a slide or film negative. Today’s digital cameras use light-sensitive CMOS sensors to record images. In full frame digital cameras, the sensor measures 36mm on the longest side. APS-C digital cameras have sensors that are about 23mm on the longest side. The camera in your smartphone or tablet is probably built around a sensor no larger than about 10 millimeters. What does sensor size have to do with this topic? A lot.

The above diagram illustrates the relative sizes of common digital camera sensor formats. The largest shown is a full frame (FX) sensor. The smallesst (lower left corner) is representaive of a typical smart phone (1/2.3") sensor.

The above diagram illustrates the relative sizes of common digital camera sensor formats. The largest shown is a full frame (35mm equivalent) sensor. The smallest (lower left corner) is representative of a smartphone (1/2.3″) sensor.

The smaller the sensor or film medium, the farther you need to be from your subject to match the field of view delivered by a given focal length lens. Imagine standing 10 feet from your subject with a full-frame DSLR camera and framing your subject head-to-toe using a normal 50mm lens. If you were to mount the same lens on an APS-C camera body, that camera’s smaller sensor would cut off or crop a portion of the image produced by the lens. You would need to step back to a distance of about 15 feet to reproduce the angle of view you had with the full frame camera body.

Another factor to consider when shooting with a “crop sensor” body is the effect of sensor size on depth of field. Depth of field (DOF) is the range of distances – nearest to farthest – in an image that appear acceptably sharp and in-focus. DOF is determined by magnification (lens focal length) and by the lens focal ratio or f-number. In a nutshell, bringing the subject closer decreases depth of field. Moving the subject farther away increases depth of field. As depth of field increases, a deeper portion of the image appears in focus. As depth of field decreases, only a narrow or shallow range looks sharp and in focus.

Both photographs were made using a Nikon D610 with Tamron 70-200 Di VC USD zoom lens at 125mm. The image on the left was shot at f/2.8 and has a much shallower depth of field. The image on the right was shot at f/32 and presents a much wider depth of field.

The above photographs were made using a Nikon D610 and Tamron 70-200mm f/2.8 Di VC USD zoom lens at 125mm. The image on the left was shot at f/2.8 and has a much shallower depth of field. The image on the right was shot at f/32 and shows much more of the field in focus.

As mentioned, focal ratio also has an effect on depth of field. For any given focal length, increasing focal ratio (making the f-number larger) increases depth of field while decreasing focal ratio (making the f-number smaller) reduces depth of field. We’ve already discussed the cropping effect of shooting with a smaller sensor. Stepping back to reproduce a desired angle of view increases depth of field. Zooming or changing lenses to shoot with a shorter focal length (to match the field of view provided by a full frame sensor body) increases depth of field.

One can compensate for the increased depth of field which results from the adjustments commonly made to expand the angle of view delivered by a crop sensor camera by shooting with smaller f-numbers. For example, shooting with a 35mm lens at f/1.4 will allow an APS-C sensor body to produce photographs having the same framing and depth of field as images made from the same position using a 50mm f/2.0 lens on a full frame body.

Let’s explore this in a bit more detail. Suppose you’re shooting with two cameras, one full frame and the other a crop sensor, and using the same 50mm lens with both. Its effective focal length (the focal length matching the angle of view delivered to the sensor) will be 50% longer or 75mm on the APS-C body. At f/4, the 50mm lens will have an aperture of 12.5mm. If we step back to compensate for the more narrow angle of view, the effective focal ratio (the focal ratio delivering an equivalent depth of field from the distance at which this lens matches the angle of view delivered to a full frame camera) will be f/6. Its effective 75mm focal length divided by the 12.5mm aperture equals six.

Do you see the relationship? We’re using an f/4 lens on an APS-C body. When the goal is to match the angle of view and depth of field produced by a full frame camera, we can determine the effective focal ratio at which a crop sensor camera needs to operate by dividing the focal ratio of the lens by the crop factor. The crop factor is 1.5 and the effective focal ratio (for depth of field) is f/6.

Here’s an illustration.

These images illustrate how to use a crop sensor camera to match both the angle of view and the depth of field delivered by a full frame body. I used a Nikon D610 and Nikon D90 to make photographs of the same toy caboose. Both cameras used a Tamron 70-200 f/2.8 Di VC USD lens. The lens was mounted on a tripod and the bodies switched out to ensure the lens would not move from its position during the test. The D610 uses a 36mm sensor and shot at 105mm, f/4 to make both images. The D90 uses an APS-C sensor with a 1.5X crop factor. I shot at 75mm, f/4 to make the first image. Comparing the first (top) images, we see that the D90 delivered a similar angle of view as the D610 but a comparison of the background shows the D610 to have a more shallow depth of field. The background in the D90 image is just skosh nearer to being in focus. For the second image, I applied the conversion factor and shot with the D90 at 70mm, f/2.8. A comparison of this image with the D610 image shows both to have delivered similar angles of view and similar depth of field. (Bill Ferris)

These images illustrate how to use a crop sensor camera to match both the angle of view and the depth of field delivered by a full frame body. I used a Nikon D610 and Nikon D90 to make photographs of the same toy caboose. Both cameras used the same Tamron 70-200 f/2.8 Di VC USD lens. The lens was mounted on a tripod and the bodies switched out to ensure the lens would not move from its position during the test. The D610 is built around a 36mm sensor and was used at 105mm, f/4 to make both images. The D90 has an APS-C sensor with a 1.5X crop factor. I shot at 70mm, f/4 to make the first image. Comparing the first (top) images, we see that the D90 delivered a similar angle of view as the D610 but a comparison of background detail reveals the D610 to have a more shallow depth of field. The background in the D90 image is just a skosh nearer to being in focus. For the second image, I applied the conversion factor and shot with the D90 at 70mm, f/2.8. A comparison of this image with the D610 image shows both to have delivered similar angles of view and similar depth of field. (Bill Ferris)

So, we’ve demonstrated that, in comparison with full frame cameras, crop sensor camera bodies produce images having narrower angles of view and, when adjustments are made to compensate for this, increased depth of field. We’ve also demonstrated that you can compensate for these performance factors. Either increase the distance between you and the subject or use a shorter focal length to increase the angle of view. Shoot at a smaller focal ratio (f-number) to make the depth of field more shallow. Next, we’ll explore the relationship between sensor size and length of exposure. Here’s a heads up, the outcome may not be what you expect.

I used my Nikon D610 (full frame) and Nikon D90 (APS-C) to take a series of exposures of a toy train engine. The toy steam engine was set up outside on a small tray table. The sky was overcast with nice, even lighting throughout the test. Both bodies used the same Tamron 70-200mm f/2.8 Di VC USD lens, which was set at 70mm. I selected ISO 200 on both cameras for all exposures. The zoom lens was set up on a tripod and the camera bodies were switched out without changing the position of the lens. I used each camera to make exposures at f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22 and f/32. I shot in aperture priority on both cameras and let their internal brains select the proper exposure.

Below, are pairs of images showing the photographs made at the same settings with the two bodies, side-by-side. All are unedited JPEGs. Keep in mind that the sensor in the D90 body cropped the image to match the angle of view produced by a 105mm lens.

In this comparison, photographs of the same subject made with a Nikon D610 (left) and a Nikon D90 (right) are shown, side-by-side. Both cameras shot at ISO 200. Both cameras used the same Tamron lens at 70mm. The lens was mounted on a tripod to ensure it would remain in the same position throughout the test. For each focal ratio, both cameras used the same exposure. (Bill Ferris)

In this comparison, photographs of the same subject made with Nikon D610 (left) and Nikon D90 (right) cameras are shown, side-by-side. Both cameras were set to ISO 200. Both cameras used the same Tamron lens at 70mm. The lens was mounted on a tripod to ensure it would remain in the same position throughout the test. At each focal ratio, both cameras metered the scene as having the same brightness and chose the same exposure. (Bill Ferris)

Let’s talk more about this f-number thing. You’ll recall that focal ratio describes the ratio of the focal length of the lens to the aperture of the lens. A 50mm lens at f/2.0 has a focal length that is 2-times its aperture. Therefore, the lens aperture at f/2.0 will be 25mm. At f/4.0, the aperture is 12.5mm; at f/8.0, 6.25mm and so on. The relationship between aperture and focal ratio is pretty straight forward: for any given focal length, decreasing aperture increases focal ratio and increasing aperture decreases focal ratio.

Rarely, however, do photographers talk about the f-number as a focal ratio. More commonly, they talk about it as a lens aperture. They talk about an f/2.0 lens having a larger aperture than an f/4.0 lens. It’s an accurate statement, if we’re talking about the same lens at different focal ratios. But this is just one of many scenarios where focal ratios are compared.

Let’s consider the scenario of discussing different lenses. Suppose we’re comparing a 50mm lens to a 100mm lens. Suppose the 50mm lens is being used at f/2 and the 100mm lens is set to f/4. One might think the 50mm lens, by virtue of having a smaller f-number, will have a larger aperture. In fact, both lenses have identical 25mm apertures. It simply isn’t the case that every f/1.4 lens has a larger aperture than every f/8 lens. In reality, it is quite common for a lens operating at a large f-number to have a larger aperture than a lens working at a small f-number. I would wager to guess that there isn’t a focal ratio at which a 600mm lens doesn’t have a larger aperture than the fastest focal ratio smartphone.

One quality that does translate across different lenses and cameras, is the speed of the imaging system. What does speed have to do with photography? To understand, it helps to think of a properly exposed photograph as one where a certain intensity of light needs to fall upon the sensor at the image plane. Think of light as water, the sensor as a container used to collect water (light) and the lens as the opening through which water is poured into the container.

That said – and this next point is critical – a properly exposed image is not determined by the total quantity of light delivered to the sensor. The length of a proper exposure is determined by the average brightness of the image falling on the sensor. To better understand this, we’re going to introduce a new concept: surface brightness.

The above illustrates the concept of Surface Brightness in photography. For a properly exposed image, the camera's optical system must collect and deliver light having a surface brightness (brightness or intensity per square millimeter) to the sensor. This is represented by the evenly deep layer of "blue" light collected bu the sensor. If you use the same lens on a crop sensor body, the same intensity of light (represented by the central red region) is delivered to the sensor. Being smaller, the crop sensor collects less total light. However, the surface brightness of the image (the brightness per square millimeter) is identical to that of the larger sensor. (Bill Ferris)

The above illustrates the concept of Surface Brightness in photography. For a properly exposed image, the camera’s optical system must collect and deliver light having a surface brightness (brightness per square millimeter) to the sensor. This is represented by the thick layer of “blue” light collected by the sensor. The thickness of the layer represents the intensity or average brightness of the image. If we use the same lens on a crop sensor body, the same intensity (thickness) of light is delivered to the sensor. This is represented by the central red zone on the sensor. Being smaller, the crop sensor collects less total light. However, the surface brightness of the image is identical to that of the larger sensor. (Bill Ferris)

Earlier, a correct exposure was described as one where a container (sensor) is filled to the correct depth (intensity) with water (light). It doesn’t matter if the container is large enough to hold one gallon or 100 gallons. As long as it’s filled to the proper depth, the exposure will be good. In this example, the depth of the water represents the average brightness of the image at the image plane. Another way to describe the average brightness or intensity of light, is to talk about image surface brightness.

Surface brightness is defined as a brightness per unit area. In photography, we can define surface brightness as the brightness of light per square millimeter falling on the film or sensor. It is not a total volume or quantity of light. Rather, it is an average intensity of light. Surface brightness is strictly determined by the focal ratio of the optical system. The lens f-number determines the length of the exposure needed to deliver light of a certain intensity to the sensor. A full frame camera, crop sensor camera and smartphone camera focused on the same subject – and all operating at f/2.0 – will deliver the same light intensity per square millimeter (the same surface brightness) to their respective sensors during the same length exposure.

The relative sizes of full frame (pink) and APS-C (blue) sensors is illustrated above. The effects of a crop frame sensor include an increase in effective focal length and an increase in effective depth of field.

The relative sizes of full frame (pink) and APS-C (blue) sensors is illustrated above. The effects of a crop frame sensor include an increase in effective focal length and effective depth of field.

Despite the fact that a crop sensor doesn’t collect as much total light during an exposure as a full frame sensor, the intensity or surface brightness of the images formed on both sensors will be the same. We saw this at work in the above illustrations comparing exposures made with the D610 and D90. Despite the fact that, during each set of exposures, the D90’s smaller sensor collected less total light than the full frame sensor of the D610, the image made by the D90 was still properly exposed. This is because the exposures made by both cameras produced images having identical surface brightness at the image plane.

This set of images compares performance between crop sensor and full frame DSLR bodies. The images in the left column were made with a Nikon D90. Images in the right three columns were made with a Nikon D610. Both cameras used the same Tamron 70-200mm f/2.8 Di VC USD zoom lens, which was set up on a tripod to ensure it would not change position during the test. Both cameras used ISO 200, center point average metering and were operated in Aperture Priority. The subject in these photos is a scale model of the Lunar Excursion Module (LEM) from the Apollo program.

This set of images compares performance between crop sensor and full frame DSLR bodies. The images in the left column were made with a Nikon D90. Images in the right three columns were made with a Nikon D610. Both cameras used the same Tamron 70-200mm f/2.8 Di VC USD zoom lens, which was set up on a tripod to ensure it would not change position during the test. Both cameras used ISO 200, center point average metering and were operated in Aperture Priority. The subject in these photos is a scale model of the Lunar Excursion Module (LEM) from the Apollo program.

The above illustration allows us to compare the performance of crop sensor and full frame cameras. The first column of D610 exposures matches the settings of the D90 images in the left-most column. Focal length and focal ratio are the same. In most cases, both cameras’ metering systems selected the same exposure. The most obvious difference between the D90 and first set of D610 images is the wider angle of view delivered by the full frame sensor. For the second set of D610 images, I zoomed in to match the effective focal length of the D90. The angles of view of these images closely match the corresponding D90 exposures. The second set of D610 images were shot at f/2.8 and clearly display a more shallow depth of field. For the third set of D610 photographs, I changed the focal ratio to match the depth of field presented in the D90 images. Notice that the exposures for these images are all 1/800-second. They’re longer to compensate for the larger focal ratio.

Focal Ratio is the key to understanding how different cameras, lenses and sensors are able to make good photographs using the same or similar length exposures. Focal ratio determines the length of time needed to collect enough light to make an image having the required surface brightness. For any two cameras operating at the same ISO and delivering the same angle of view, the exposure times will typically be the same.

So, the next time you read or hear a photographer talking about an f/1.4 lens having a larger aperture than an f/2.0 lens, stop and give that statement some thought. If the lenses being compared are a 20mm f/1.4 and a 50mm f/2.0, the 50mm lens will be operating with a larger aperture. The 50mm lens will have a 25mm aperture at f/2.0 and the 20mm, f/1.4 lens aperture will be just over 14mm. However, due to its faster focal ratio, the 20mm lens will deliver more light per square millimeter to the sensor, faster. Because the f/1.4 lens produces a brighter image – an image having a higher surface brightness – the length of the exposure will be shorter.

In photography, the objective is not to deliver the largest volume of light to the sensor. The objective is to deliver the needed intensity (surface brightness) of light to the sensor. Speed is everything and focal ratio is the key.

Now, get out there and shoot!

Bill Ferris | August 2015

Camera Settings – Landscape Photography

It is April and spring has arrived at Monument Valley along the Arizona/Utah border. The pastel glow of twilight dyes the valley a cool hue while warm light from a setting Sun catches the wispy overhead clouds. (Bill Ferris)

It is April and spring has arrived at Monument Valley along the Arizona/Utah border. The pastel glow of twilight dyes the valley a cool hue while warm light from a setting Sun catches the wispy overhead clouds. (Bill Ferris)

There have been more than a few days when I’ve wondered if I travel to do photography or if the camera is just an excuse to get outside amidst inspiring landscapes. Actually, there is no wondering about it. It’s the latter. I have a deep, soulful connection to nature. Truth be told, if faced with the choice of spending my remaining years alone in a magnificent wilderness or amongst the beehive of activity in a major city, I might choose the wild.

It should come as no surprise, then, that landscape imaging is my first love in photographry. Since a move from the Midwest to northern Arizona nearly 20 years ago, I’ve been blessed to have ready access to some of the most dramatic and iconic landscapes of the American West. Grand Canyon, Monument Valley,  Arches, Canyonlands – these are nature’s cathedrals. These are the places where I hone my craft and renew a spiritual connection with the world.

This blog continues the series in which I share the camera settings I use for specific genres of photography. Today’s genre is landscapes and these are the settings:

  • Mode: Aperture Priority
  • Aperture:  f/13 to f/22
  • ISO: 100 to 200
  • Image Format: RAW
  • Focus: Back Button or Live View
  • Shutter Release: Timed with a 5-second delay
  • Essential Gear: Tripod
Late day light paints Zoroaster Temple in Grand Canyon a deep amber hue as seen from a campsite along Clear Creek Trail. (Bill Ferris)

Late day light paints Zoroaster Temple in Grand Canyon a deep amber hue as seen from a campsite along Clear Creek Trail. (Bill Ferris)

Great light is the first element of a great landscape. While it is absolutely possible to make a fantastic landscape exposure in midday light, the golden hour times of sunrise and sunset are the most prized. The soft earthy glow adds a dramatic feel and reveals the inner beauty of a place. Weather, is the second key element. Clouds, rain and lightning put passion on display. Snow reveals the essence of a place and hints at possibilities to come.

A common theme connecting the above, is the relatively low light levels one encounters when shooting under such conditions. Unlike other genres (e.g. sports, wildlife and portraiture), short exposures and shallow depths of field are not necessarily desirable when shooting landscapes. More typically, you want great depth of field. Also, since your subject is mostly static, exposure times can be longer without compromising image sharpness.

An f/13 to f/22 aperture will deliver an in-focus, sharp image through the fore-, mid- and backgrounds. (APS-C bodies can achieve the same at f/9 to f/16.) With depth of field being so critical to achieving the desired result, I usually shoot in Aperture Priority mode and dial in an aperture – more accurately, a focal ratio – of f/13. Depending on the lighting and composition, I’ll go as large (in focal ratio) as f/22 or more.

Of course, I always shoot in RAW to allow as much latitude as possible during processing.

White House ruin in Canyon de Chelly National Monument (Chinle, Arizona) (Bill Ferris)

White House ruin in Canyon de Chelly National Monument (Chinle, Arizona) (Bill Ferris)

To maximize image quality and minimize noise, I typically use the base ISO of the camera body. In the case of the Nikon D610, the base ISO is 100. This combination of low light, small aperture and low ISO forces the camera to use relatively slow shutter speeds to make a properly exposed image. When shooting just before sunrise or shortly after sunset, an exposure of 1-second or longer may be needed.

Long exposures demand a solid, stable platform to ensure good sharpness in the resulting image. This makes a tripod essential gear for the landscape photographer. I use a Benro model tripod. It is designed to be lightweight and portable, while still providing good stability. It is not as rock solid as other beefier designs, which means I’m always in need of a sheltered location when doing photography in a strong wind.

A technique I use to minimize vibration, is setting a 5-second delay on the shutter release. This allows any vibration introduced when I push the shutter release to dampen before the exposure begins. I also use either back button focus or contrast detection focus in Live View to help ensure best focus. Contrast detection, while slower, is sometimes a bit more accurate than phase detection. Moving focus control off the shutter release button minimizes the risk of a last second focus change when an exposure is made.

Using these settings, allows me to take full advantage of the spectacular landscapes populating the Desert  Southwest. If you are a landscape enthusiast, I hope you find they help your results, as well.

So, get out there and shoot.

Bill Ferris | April 2015

Wilderness Basics

Clear Creek cuts a path from the North Rim to the Colorado River in Grand Canyon. It is also home to one of the sweetest perennial water flows in the great chasm. Arguably, the signature feature of Clear Creek is the 10-foot waterfall about a mile from the Colorado River. It is a popular day hike destination, both for river parties and for backpackers. This 1-second exposure captures the delicate beauty of the sideways waterfall and invites you to make Clear Creek a destination on your next visit to Grand Canyon National Park. (Bill Ferris)

Clear Creek cuts a path from the North Rim to the Colorado River in Grand Canyon. Arguably, the signature feature of Clear Creek is the sideways 10-foot waterfall about a mile from the river. (Bill Ferris)

Last month, I did my 23rd overnight backpack in Grand Canyon National Park. The first was in 2006, an experience that forged a lifelong connection to the most spectacular of America’s national parks. During the years since, I have hiked nearly 1,160 miles and camped 109 nights below the rim. From Nankoweap to Crazy Jug north of the river and south from the Little Colorado to Bass, I’ve walked through every side canyon that empties into the mighty Colorado.

What motivates these treks is two-fold. First, is the deeply spiritual experience of hiking in Grand Canyon. It is a feeling and place like no other. Second, is the opportunity and challenge of using my camera to capture the magnificence of this natural wonder. This recent trip confirmed my thinking about the equipment and techniques essential to making a successful photograph in a wilderness environment. In short, you need to get back to basics.

Wilderness backpacking is an activity where success or failure rests on your ability to manage resources. The resources include the gear you bring, the food you eat and the water you drink. Successful management of these items rests on your ability to prioritize, to identify those things which are essential, of value or merely trivial.

Water is essential, something you need to consume every day to maintain physical and mental well being. In a desert environment such as Grand Canyon, you had better have it or know with confidence where it can be found. Food is essential. Your pack, clothing, safety gear and first aid kit are essential.

A camera and tripod, while of value, are not essential. Neither are critical to day-to-day survival. Neither is a tool that helps you get from point A to point B. Neither provides shelter from the elements or assistance during an emergency. For most backpackers, these would be considered trivial items. Most people would bring a smart phone as a resource for communication with family and friends, during an emergency. At other times, it can function as a camera. Some hikers would bring a point & shoot – something lightweight that fits nicely in a pocket – or perhaps a small tripod or Gorilla Pod.

The gravelly carpet of the lower narrows yields to the stoney floor of the upper, in this photograph of Vishnu Narrows in Grand Canyon National Park. (Bill Ferris)

The gravelly carpet of the lower narrows yields to the stoney floor of the upper, in this photograph of Vishnu Narrows in Grand Canyon National Park. (Bill Ferris)

As a dedicated landscape photographer, the camera and related equipment – while non-essential – are highly valued by me. Two years ago, I replaced and upgraded several critical pieces of backpacking kit with the goal of reducing weight while maintaining performance. The items included my backpack, shelter, sleeping bag, sleeping pad and water treatment kit. The net result was a reduction of nearly five pounds in my backpacking base weight. (Base weight is the weight of the pack and all non-consumable contents.)

What did I do with those five pounds? Did I walk a bit lighter and quicker down the trail? Of course not. I reassigned it to photographic equipment. Instead of hiking with a crop format camera body, I now bring a full-frame sensor body. I also added a lightweight but full-size travel tripod to my kit. These items added a bit over four pounds to the weight of my pack. They also significantly increased the enjoyment I get from doing photography while backpacking.

Here’s the complete list of photographic gear I brought on a recent eight-day Grand Canyon backpack:

  • Nikon D610 camera body (w/ two spare batteries and two spare 32 GB SD cards)
  • Nikon 16-35mm f/4 wide angle zoom lens (w/ lens cleaning cloth and wipes)
  • Benro A1690T aluminum travel tripod with Benro B0 ball head (w/ backpack straps)
  • Peak Design Capture Camera Clip Pro mounting system
  • Peak Design Slide camera strap

Almost any camera (smartphone, point & shoot, etc.) can make an excellent picture in the full light of day. The equipment I packed allowed me to make excellent photos in any lighting, even at night. The D610 is a top-5 ranked camera body when it comes to the combination of resolution, dynamic range and low light performance. That 24 megapixel Sony sensor is a beast. The 16-35mm zoom lens allows me to capture awe-inspiring wide angle views. An equivalent lens on a crop-frame body would have a focal length in the 10-11mm range. No smart phone or point & shoot comes close to delivering such a wide angle view.

Early on a March morning, the summer Milky Way rises over Grand Canyon National Park. A pristine night sky is a treasure. Standing beneath a starry canopy, one can simultaneously feel insignificant and connected to all things. There is no greater cathedral, no place I feel more at home. (Bill Ferris)

Early on a March morning, the summer Milky Way rises over Grand Canyon National Park. A pristine night sky is a treasure. Standing beneath a starry canopy, one can simultaneously feel insignificant and connected to all things. There is no greater cathedral, no place I feel more at home. (Bill Ferris)

The tripod enabled me to capture quality exposures during the golden hour and at night. Without the tripod, I would have had to shoot with wide open apertures and high ISO’s to keep exposure times reasonable. With the tripod, I could use the base ISO, a small f/13 aperture and capture tack sharp landscapes during twilight. I could also make longer 1-second exposures of a waterfall to give the flowing water that silky smooth quality. Or, I could make 30-second exposures of the night sky at very high ISO to record a stunning image of the Milky Way rising over Grand Canyon.

Equally important, was what I did not bring: no backup body; no second (or third) lens; no filter(s); no speedlight(s); no reflector. Under different circumstances, I would normally have brought all these items. However, in an environment where every ounce and each square inch of space matters, these accessories are non-essentials.

I know a lot of landscape photography enthusiasts will question the decision not to bring even one filter. After all, filters are relatively small and light. Surely, I could have fit a neutral density filter, a graduated ND or a UV filter in my kit? Well, I could have. I also could have used that weight or space for more water, more food, rain gear, another clothing item or some other even more essential item.

The bottom line reality is that much of what filters offer can be achieved in Adobe Lightroom. Shooting in RAW combined with good decision-making about what to photograph and judicious use of exposure compensation allows me to capture original exposures that can be edited in Lightroom to optimize exposure, details and highlights in any area of the final photograph. All this can be accomplished in a few minutes or less. Filters, while definitely of value, are non-essential.

The 24 MP sensor combined with Lightroom’s single button click tools correcting lens distortion and chromatic aberration give me the option of shooting at 35mm in the field, then cropping to 50mm or even 75mm during post-production. In short, image processing offers the option of converting a wide angle image into a photograph captured with a standard focal length lens.

Of course, the real fun during the hike was making images that take advantage of what a true wide angle lens offers. Of the more than 1,000 photographs I took during the eight-day trip, only a handful have been cropped more than about 10% during processing. Ninety percent or more have not been cropped, at all. Some may view shooting with just one lens for a week as limiting. I saw it as both a challenge and an opportunity. The opportunity was to make dramatic wide angle landscapes in a truly stunning natural environment. The challenge was to be creative with my use of the lens throughout the week.

A backpacker steps carefully along a crumbling ridge while late day light paints a Tapeats tower in Grand Canyon National Park. (Bill Ferris)

A backpacker steps carefully along a crumbling ridge while late day light paints a Tapeats tower in Grand Canyon National Park. (Bill Ferris)

In hindsight, it wasn’t a challenge, at all. It was easy. Throughout the week, there was only one time when I missed not having a long telephoto lens in my pack. (We were standing at the edge of the Tonto Plateau looking into Vishnu Canyon and found the remnants of an old miner’s cabin. The ruins were about half-a-mile distant and, while plainly visible through a 10X monocular, were simply beyond the reach of a 35mm lens.) But for that, it was a genuinely enjoyable week of hiking in and making landscapes of Grand Canyon National Park.

You don’t need to spend a week backpacking in a wilderness area to experience the joys of shooting with a minimal kit. You can do it, any time you wish. All it takes is the willingness to leave all but your most basic and necessary gear at home. This weekend, choose one camera, one lens, a tripod, a couple of spare batteries and media cards, and allow yourself to spend an entire day taking and making great photographs with just that essential equipment. Get back to the basics.

Go ahead, get out there and shoot.

Bill Ferris | April 2015

Camera Settings – Wildlife Photography

An American White Ibis preens in the late afternoon light at Disney World Epcot theme park. (Bill Ferris)

An American White Ibis preens in the late afternoon light at Disney World Epcot theme park. (Bill Ferris)

This post continues a series on camera settings for specific genres of photography. As I mentioned in the first installment, I am not suggesting these settings will be best for every photographer. I am sharing them because they work for me and may be of some help to you.

As the above image indicates, this post will focus on settings for bird and wildlife photography. Let’s begin with my goals when shooting animals in a natural setting:

  • Communicate the wild
  • Convey the personality of the animal
  • Bring the viewer close

There is something about an animal in a wilderness setting that captures the imagination. This is particularly true in cultures that feel a strong connection to a past when people lived, struggled, thrived and died in wilderness places. They competed not only with the land and weather but also with animals. Some animals were hunted as sources of food and clothing. Others were hunted as competitors for scarce food resources or as threats to people.

A photograph of an animal in a wilderness setting has the potential to reconnect us with that pioneer heritage. It can make the pulse quicken and loose a surge of adrenalin in the blood. Communicating the wild is as much about setting as the animal, itself. Framing the shot with a rugged terrain or severe weather conveys a sense of wilderness. The personality of the animal comes to life through action. Interesting – even aggressive – behavior does the trick. Sometimes, the suggestion of a behavior that is about to happen can be even more compelling. Capturing the instant before the animal becomes aggressive hints at wildness and allows the audience’s imagination to fill in the rest.

The Kilimanjaro Safaris tour at Disney World Animal Kingdom exposes visitors to a host of animals native to Africa, including the giraffe. (Bill Ferris)

The Kilimanjaro Safaris tour at Disney World Animal Kingdom exposes visitors to a host of animals native to Africa, including the giraffe. (Bill Ferris)

A long telephoto lens can bring the viewer close enough to feel the breath of the animal. Stealth and patience, when skillfully employed, can have the same effect. Every guideline has its exceptions and this one is no different. A wide angle lens capturing the interesting behavior of a collection of animals in the wild can be just as inspiring.

Bird and wildlife photography is a relatively new interest for me. I’m still searching for that heart-stopping image of an apex predator in the wild, or an iconic creature persevering against nature’s maelstrom. However, the technique of capturing such moments is fairly well ingrained. I’ll be ready when the moment arrives. Here, are my settings:

  • Aperture: f/2.8 to f/5.6
  • ISO: ISO-auto with 1/500 to 1/1000-second as minimum shutter speed and 6400 as maximum ISO
  • Back Button Focus: AE-L/AF-L button assigned to autofocus control
  • Burst Rate: Low (3 fps) to Continuous High (6 fps)
  • Image Quality: RAW
  • Exposure Compensation:  +2/3 to 0 to -2/3 stop

I use a large aperture to blur the background and isolate the subject. A wide open aperture also allows for the use of more reasonable ISO’s when shooting early in the day. Now, an aperture closed one stop from wide open will do a better job of capturing pin sharp detail in the animal. So, if the light level will allow it and if there is significant distance between your subject and the background, consider closing down the lens a bit.

Back button focus is a great technique for just about any type of photography. It gives you more control over focus point and framing. If the animal is moving slowly, a shutter speed of 1/500-second will do an excellent job of freezing action. However, birds in flight and other more aggressive actions demand a faster shutter speed. A low burst rate works fine for an animal slowly grazing for food. A faster burst rate is called for when shooting birds in flight and other more dynamic action.

A bull Elk eyes a gathering crowd of tourists on the South Rim of Grand Canyon National Park. (Bill Ferris)

A bull elk eyes a gathering crowd of tourists on the South Rim of Grand Canyon National Park. (Bill Ferris)

Finally, you’ll want to pay attention to the coloration of an animal. Animals with dark fur may require an exposure compensation of +2/3 stop to preserve detail. By contrast, compensation of -2/3 stop will preserve feather detail when photographing a bright white bird.

These are the settings I use when photographing birds and animals. If you give them a try, I think you’ll find the results rewarding. At the very least, you’ll gain a better understanding of the settings that work best for you.

Now, get out there and shoot!

Bill Ferris | April 2015

Camera Settings – Sports Photography

NAU's Eddie Horn grabs a handful of facemask to prevent Eastern Washington's Quincy Forte from reaching the end zone

NAU’s Eddie Horn grabs a handful of facemask to prevent Eastern Washington’s Quincy Forte from reaching the end zone (Bill Ferris)

With this post, I’m launching a series in which I will share the settings I use for specific genres of photography. Each article will focus on one kind of photographry: landscape, wildlife, event, portraiture and, in this entry, sports.

Right off the top, I want to be clear about something. The settings I use are not necessarily best for everyone. In fact, I suspect the opposite may be closer to the truth. Many professional and experienced amateur photographers prefer to shoot in full manual mode. I don’t.

In any given situation, there are some settings I absolutely want to control and others I’m perfectly comfortable allowing the camera to control. It’s been my experience that modern digital cameras are reliably competent at choosing settings like shutter speed and ISO. Even if the setting the camera chooses is off by 1/3 to 1/2 a stop, shooting in RAW allows me to correct for that in post with just a few clicks of the mouse.

In short, the settings I use work for me and my workflow. My intent in sharing them in this series is that they may help you to make better photos and get more satisfaction from photography.

So, let’s get to it. Here, are the  settings I typically use with my Nikon D610 when shooting sports:

  • Mode: Aperture Priority
  • Aperture: f/2.8
  • ISO: ISO-auto with 1/1000-second as minimum shutter speed and 6400 as maximum ISO
  • Autofocus: Continuous with a 9-point cluster at the center
  • Back Button Focus: AE-L/AF-L button assigned to autofocus control
  • Burst Rate: Continuous High (6 fps)
  • Image Quality: RAW

Why? Let’s start at the beginning. Before I start shooting, I give some thought to what I want to accomplish with the photograph. Here are my goals for sports photography:

  • Capture the decisive moment
  • Communicate the emotion of that moment
  • Put the audience in the middle of the action

The above settings allow me to accomplish all three.

A goalkeeper prepares to send the ball out of her zone.

A goalkeeper prepares to send the ball out of her zone. (Bill Ferris)

The first decision I make when setting up the camera is selecting a mode to use. I never shoot in full Auto. In that mode, the camera makes all the decisions and I’ve yet to find a camera having an aesthetic identical to mine. I rarely shoot in Manual. In that mode, I make all the decisions and, frankly, that’s just a lot of work.

Aperture Priority allows me to lock in a focal ratio. Normally, I’ll set the lens to f/2.8. Since I’ll be using a fast shutter speed to freeze action, I need to deliver big heaping gobs of light to the sensor to produce a properly exposed image. Shooting at f/2.8 maximizes the light collected by the lens and delivered to the sensor, at any given moment.

A large aperture also produces an image with a shallow depth of field. That is a huge plus when shooting sports. Often, the shot is focused on one player, coach or person. But how to draw attention to someone who is surrounded by a melee of athletes, officials and fans? A shallow depth of field serves to isolate the subject by putting everything and everyone else out of focus.

With a wide aperture selected and locked in, the next choice is which shutter speed to use. For basketball, soccer and football, I have found a shutter speed of 1/1000-second does a great job of freezing the action. Now, I could do this by putting the camera in manual mode, selecting the aperture (f/2.8), shutter speed (1/1000-second) and ISO. But I’m lazy. I don’t want to be responsible for all three variables. I want the camera to do some of the work. I’ll choose the aperture and shutter speed, and let the camera choose the ISO.

This is why I use Nikon’s Auto-ISO setting. In this setting, you choose a minimum shutter speed and a maximum ISO. For sports, I select 1/1000-second and a maximum ISO of 6400. Shooting with the D610, I’ve been very pleased with the quality of images taken at ISO 6400

At this point, I’m almost ready to start shooting.

This photograph was taken with a Tamron 70-200mm at 135mm, f/2.8, ISO 3600, 1/640-second

This photograph was taken with a Tamron 70-200mm at 135mm, f/2.8, ISO 3600, 1/640-second (Bill Ferris)

Next, i check the image quality setting to confirm it’s still in RAW. Shooting in RAW serves several purposes. First, it is the format that captures and preserves the most information about each image. The more information there is at my disposal, the greater the flexibility I have in post. RAW allows for adjustments to be easily made in Lightroom, not just in exposure, but also in white balance, contrast and a host of other key settings. As such, shooting in RAW gives me the greatest latitude when processing an exposure. And since I’m trusting my camera to choose the ISO, RAW acts as my insurance policy against a setting that is off by as much as a full stop. Typically, however, the Nikon D610 is within 1/3-stop in the ISO it chooses.

To ensure that my photographs are properly focused, I use Nikon’s AF-C or continuous autofocus mode. In this mode, the camera continuously adjusts focus to keep the subject sharp, For most events, I’ll use a cluster of nine autofocus points – sometimes, a single point – to allow the camera to focus on the subject while ignoring distracting objects within the frame. The autofocus points at the center of the frame are most accurate. Hence my preference for a central grouping.

Now, to give myself more control over when and where focus is set, I also engage back button focus. This is a technique where you assign focus control to a button on the back of the camera body. I assign focus control to the AE-L/AF-L button on my Nikon D610. With back button focus engaged, I am able to push the AE-L/AF-L button when I want to set focus. If I’m shooting a stationary subject, I can set focus then remove my finger from the button and recompose. If the subject is moving, I’ll continue pressing the button and allow the camera to follow focus while I’m keeping the subject framed.

With 12-seconds left in regulation, NAU's Dan Galindo hauls in a Jordan Perry pass to score the game-winning touchdown

With 12-seconds left in regulation, NAU’s Dan Galindo hauls in a Jordan Perry pass to score the game-winning touchdown. (Bill Ferris)

Almost by definition, athletes are quick and fast-moving subjects. As such, I use my camera’s highest burst rate to rip 6-10 exposures in a 1-2 second burst. This gives me the best chance of capturing the decisive moment. The only thing that’s missing from the above photo, is the official’s arms in the air signaling a touchdown. But that didn’t happen until long after the receiver made the catch.

While we’re on the subject of moments, let’s address a setting that, all too often, is ignored. Moments are fleeting. As soon as you recognize one as being of significance, it is already gone. One of the keys to successful sports photography is anticipating a decisive moment, recognizing that it is about to happen. This has more to do with you, as a student of the game, than with your camera settings. Know the sport. Decide ahead of time the kind of moment you want (a score, a collision, the joy of victory, dignity in defeat), watch for that moment, recognize when it is about to happen and press the shutter release.

Now, get out there and shoot.

Bill Ferris | January 2015

Nikon D750 – Let the Stoning Begin

The Nikon D750 (image used courtesy of Nikon USA)

In photography as in life, it sometimes seems no good piece of kit goes unpunished. In 2012 as the world imaging community prepared to descend upon Cologne, Germany for the biennial imaging fair known as Photokina, the two leading manufacturers of consumer and professional digital cameras introduced major new products. About a week before the fair Nikon introduced the D600. Days later, Canon introduced the EOS 6D. Marketed as entry level full-frame CMOS sensor bodies, the D600 and 6D were intended to attract enthusiasts and crop-frame camera users to make the move into full-frame. The D600 joined Nikon’s flagship D4 and professional D800 and D800e in the FX category of full-frame DSLR bodies. Canon’s flagship 1DX and professional 5DMkIII welcomed the EOS 6D in completing that full-frame lineup.

Fast forward to the present day and, as the 2014 edition of Photokina opens, Canon has not introduced a new full-frame body since 2012. By contrast, Nikon has introduced four new FX (full-frame) DSLR cameras, including the just announced D750. The D750 features an impressive spec sheet:

  • An all-new 24.3 MP CMOS sensor
  • Nikon’s most advanced 51-point auto focus system (incl. group area AF)
  • Nikon’s flagship Expeed 4 image processor
  • Native ISO range of 100 to 12,800 (expandable to ISO 50 and 51,200)
  • Full 1080p/60 HD video (incl. auto aperture/auto ISO smooth adjust)
  • Light but strong carbon fiber and magnesium alloy frame
  • Nikon’s first FX body to feature built-in WiFi
  • The first full-frame DSLR by any manufacturer to sport an articulating rear LCD screen
The Nikon D750 features an articulating rear LCD screen (image used courtesy of Nikon USA)

The Nikon D750 features an articulating rear LCD screen (image used courtesy of Nikon USA)

The response to the D750 on the InterWeb has been immediate and impassioned. Much of the response has been intensely negative. Peruse the popular rumor and fan boy sites, and you will likely see comments such as – Another toy camera from Nikon…It’s disappointing…This is an instant fail IMO…This sucks.

So, why all the venom directed toward a camera that, on paper, makes a strong case for being the best all-around DSLR on the planet? To understand, we need to go back in time to another Photokina summer. In July 2008, Nikon introduced the D700, a professional full-frame DSLR body. It was just the second FX body developed and released by Nikon and was packaged with many of the performance specs of the flagship D3. The D700 featured the same sensor as the D3, a rugged frame, similar controls and layout as the top line pro body and a burst rate that, when paired with Nikon’s battery grip, topped out at an impressive eight frames per second. D3 shooters bought the D700 as their backup body and many pros bought the D700 as their primary body. Adding the rugged crop sensor (DX format) D300 to the mix gave Nikon a trio of professional bodies to meet the needs of dedicated still photographers,

In digital photography, the lifespan of a flagship body generally runs between two and four years. Canon unveiled the EOS 1DX in October 2011. This body replaced the EOS 1DsMkIII (2007) and was a shot across the bow of the long-in-the-tooth Nikon D3. Thus, it was not at all surprising when Nikon announced the all-new 16 MP D4 in January 2012. The D4 replaced the D3 and immediately established itself as a worthy adversary to the 1DX. With the D4’s release, D700 and D300/D300s shooters waited for the next shoe to drop. Which would it be, a replacement for the D700 or the D300?

One month later in February 2012, Nikon announced the D800 and D800e. Previously, Nikon had built a reputation of developing low megapixel (relative to Canon) pro bodies that excelled in low light. With the 36 MP D800 and D800e, Nikon more than doubled the resolution of the Flagship D4. These bodies quickly became favorites of landscape and portrait photographers. However, loyal D700 shooters were left wanting more. While the D700 could make images at an impressive 8 FPS, the D800/D800e barely made 4 FPS. What they wanted was the D4’s sensor, Expeed 3 processor and auto focus system in a D800 body.

An overhead view of the Nikon D750 (image used courtesy of Nikon USA)

By mid-2012, the Web was abuzz with talk of a D700 replacement being announced at the next Photokina. When the D600 emerged as Nikon’s major announcement in Cologne, D700 fans were not pleased. Despite its 24 MP (two-times the D700’s resolution) CMOS sensor, superior low light performance and 1080p video recording capability, the D600 was missing several key features in the eyes of D700 loyalists.

  • No professional build quality. The D600 offered weather resistance but didn’t have the D800’s rugged full magnesium alloy frame.
  • No 51-point auto focus system. The D600 inherited the D7000’s 39-point AF system.
  • Not a pro layout. The controls and menus were designed to be familiar to D90 and D7000 shooters.
  • No 1/8000-second shutter speed. The D600 peaked at 1/4000-second.
  • No 1/250-second flash sync speed. The D600 peaked at 1/200-second.
  • No 8 frame per second burst rate. the D600 peaked at 6 frames per second.

What D700 owners had asked for was a D4 imaging system in a D800 body. What the D600 offered was basically an FX version of the consumer D7000. What was Nikon thinking? Well, they may have been focused on costs and customer retention. In business, one of the keys to maximizing profit is to reduce operational costs. The rugged, pro-build quality of the D4 and D800 bodies were more expensive to produce than the consumer quality D7000. While a hypothetical D700 replacement would need to be manufactured in Japan at greater expense and narrower margin, the D600 could be manufactured in Thailand at lower cost and a higher profit margin.

Another factor Nikon must have considered was the migration of point & shoot photographers to smart phones. The rise of the smart phone had given the general public a take everywhere camera with immediate access to Facebook and Twitter where they could share photos with family and friends. Point & shoot camera sales were in free fall in 2012 and Nikon must have been concerned this trend would eventually hit the crop sensor market. Rather than invest in a format they considered to have a questionable future, Nikon chose to entice enthusiast and crop sensor photographers to upgrade to full frame. The D600 was priced at 1/2 to 1/3 the cost of Nikon’s professional FX bodies yet delivered comparable image quality. Yes, the D4 was better in low light and, yes, the D800 delivered higher resolution, but the D600 was no slouch. It offered comparable performance at a consumer price…or so it seemed.

Soon after D600 bodies started shipping. Reports surfaced on the web of oil and dust particle build up on the camera’s CMOS sensor. One D600 owner produced a time lapse video showing an accumulation of debris and oil that would choke a horse. Nikon had a problem. Their gift offering to enthusiast photographers was turning out to be a Trojan horse. However, Nikon refused to acknowledge what the reports and evidence clearly indicated – the D600 shutter mechanism had a problem. Nikon’s failure to immediately address the problem would allow it to grow into a major public relations disaster that deeply tarnished the company’s reputation as a manufacturer of quality imaging products.

In February 2013, Nikon finally issued a service advisory on the D600. The advisory offered guidance on the correct procedure to use when removing the natural accumulation of dust from a sensor. In essence, Nikon was dismissing the reports as normal dust accumulation. Meanwhile, D600 owners continued to report problems with their cameras and the impact on sales was immediate. When the camera was first introduced in September 2012, a launch price of $2,097 had been set. By November, Nikon was offering instant $100 rebates on their new body. By Christmas, customers were offered a free 24-85mm lens with the purchase of a D600. In January 2013, grey market distributors were pricing the D600 at $1,686. In May, a factory refurbished D600 was priced at $1,560. The camera’s value was in rapid decline and its reputation as a product that had been rushed to market too soon was forever sealed.

In October 2013 – only a year after the first D600 bodies shipped – Nikon introduced the D610. It was announced as a minor upgrade to the D600 but everyone knew it was an attempt to bring and end to the dust and oil disaster. The move backfired. If anything, Nikon’s decision to reissue the D600 with a new shutter mechanism was seen as tacit admission that the dust and oil problems were real. In February 2014, Nikon issued a service advisory to D600 owners offering a free inspection, cleaning and shutter assembly replacement, regardless of the warranty status of their cameras. In March, China ordered Nikon to stop selling the D600. This was followed soon after by a third service advisory that mentioned the option of, on a case-by-case basis, replacing defective D600s with D610s. In August, Nikon reached a settlement in a class action lawsuit with D600 owners. As part of the settlement, litigants were offered new D610s in exchange for their D600s.

To date, Nikon has yet to publicly acknowledge and take responsibility for delivering a camera with a poorly designed shutter mechanism that allows the accumulation of dust, debris and oil on the sensor.

A view of the Nikon D750 interior reflex mirror system (image used courtesy of Nikon USA)

To fully appreciate the damage the D600 dust and oil debacle has done to Nikon’s reputation, consider that DxO Mark tested the D600 soon after its initial release and ranked it as the third-best digital camera sensor on the market. This should have been a time of celebration, with Nikon reaping the rewards of having delivered an outstanding entry level full-frame DSLR camera. Instead, they spent a year in denial and are still in damage control. Even the D610, which by all accounts does not suffer from the dust and oil issue of the D600, has not been able to distance itself from that long, dark shadow.

Which brings us back to the just-announced Nikon D750. In early August when Nikon Rumors announced Nikon’s plan to introduce a new full-frame body at Photokina, the early reports described it as an action camera. Then, came the rumor that the new DSLR would be called the D750. This generated an immediate buzz as people made the obvious connection to the dream of a long-awaited successor to the D700. The online comments quickly focused on the wants of D700 owners: professional build quality, fast and accurate auto focus and a lightning quick burst rate. A D4s sensor in a D810 body is what D700 owners had come to expect.

That is not the D750.

Nikon markets their DSLR cameras in three categories: Entry-level, Enthusiast and Professional. The D750 is Nikon’s top Enthusiast level DSLR camera. Nikon does not market the D750 as a professional camera body. It is not the D4s sensor in a D810 body. Neither is it, as the many critics have claimed, a souped up D610 sensor in a D610 body. And this, friends, is where the D750 story gets interesting. One could fairly describe this camera as a cross over. It borrows features from all digital camera categories.

The D750’s outward appearance is almost identical to the D610. Beneath that enthusiast level surface, lies a completely new animal. The frame is a magnesium alloy, carbon fiber blend resulting in a rugged, weather resistant and relatively lightweight body. The layout of the interior components is completely new for Nikon. This internal redesign created space for fully-integrated WiFi while substantially reducing the size and weight of the camera body. WiFi is pretty standard stuff in consumer bodies. Small size and low weight are definitive qualities of mirrorless cameras. Rugged build and weather resistance are qualities that define professional DSLR bodies.

A side view of the Nikon D750 showing the articulating rear LCD screen (image used courtesy of Nikon USA)

The Expeed 4 processor and 51-point AF system are taken straight from Nikon’s flagship D4s and professional D810. Other features borrowed from Nikon’s professional lineup include full 1080p/60 HD video, auto aperture and auto ISO during video recording, and an industry-leading focus detection range of -3 to +19 EV. The articulated rear LCD is another feature taken from their consumer line of camera bodies. Performance characteristics shared with the enthusiast level D610 include a 1/4000-second maximum shutter speed and a 1/200-second flash sync speed.

In the D750, Nikon has delivered a camera designed and intended to appeal to a broad audience. In so doing, they’ve made a camera that – while incorporating features from several genres – is impossible to peg into any one category. The 24 MP sensor is among the best available…but it’s not the D810’s 36 MP sensor. The 6.5 frame per second burst rate is among the fastest in the market…but it’s not as fast as the 1DX or the D4s. (or the D700) The 1080p/60 HD video recording capability is very good…but it’s not 4K. The build quality is rugged and weather resistant…but it’s not weather proof. It’s impressive feature set is packed into a small, lightweight body…but it’s not mirrorless small.

In a nutshell, the D750 seems to be a Jack of all trades and a master of none. There is, perhaps, one exception. Could the D750 be the master do-it-all camera?

If you enjoy shooting sports, the AF system and burst rate will more than get the job done. In the professional full-frame DSLR category, only the Canon 1DX and Nikon D4/D4s have faster burst rates. If you enjoy portraiture and landscapes, the 24 MP sensor will deliver gorgeous, detailed images. Only Nikon’s D8XX lineup offers higher resolution. On paper, no DSLR does a better job of achieving focus in low light and the high ISO performance of the D750 is among the best in the market. If you enjoy shooting video, the D750 allows production in full HD with stereo audio. The dedicated video professional may be better served by the Panasonic Lumix GH4 or the Sony A7s. However, the D750 offers video functionality that is more than adequate for the enthusiast.

In short, the Nikon D750 looks for all the world like one of the best – arguably the best – choice as the camera that can do it all. If you are a professional photographer looking for a second body, wouldn’t it be nice to replace your current backup with something that is a little smaller and lighter? Something with outstanding resolution and low light performance? A camera with industry-leading auto focus? A camera you can use to capture quality video and sound? A backup body that does all this at a price point below $2,500? If you are an aspiring professional looking for one body that can take on any assignment (or an enthusiast seeking the same) does the D750 look like the perfect all-around performer? This is a camera body that, on paper, appears capable of shooting anything: editorial, sports, wedding, landscape, portraiture, wildlife, street, video…you name it.

Is the new Nikon D750 the best all-around DSLR camera in the world?

Bill Ferris | September 2014

M, Is for Manual

This single exposure was shot at sunset from a vantage point below Desert View Watchtower on Grand Canyon's South Rim. Angels Gate, an iconic formation in the canyon, stands in silhouette toward the upper right corner. One of the reasons I like scenes such as this is they remind me of childhood school projects...cutting random shapes from different colored sheets of paper and layering them into some interesting pattern. (Bill Ferris)

This single exposure was shot at sunset from a vantage point below Desert View Watchtower on Grand Canyon’s South Rim. Angels Gate, an iconic formation in the canyon, stands in silhouette toward the upper right corner. (Bill Ferris)

If you’re up for having some fun with your new camera, rotate the program dial to the M setting. M, stands for Manual. In this setting, you get to choose the ISO, the aperture and the length of the exposure. I realize the thought of taking responsibility for these critical settings can be intimidating. But don’t let that stop you. Sometimes, it’s fun to be a little afraid or intimidated. And you know what, it’s actually pretty easy to take good photos in manual.

We’ll start by keeping the camera in Auto, framing a shot and taking an exposure. Next, review the image and note the three critical settings: ISO, aperture and length of exposure. Write down the numbers. As we’ve discussed, ISO is the sensitivity of the camera sensor to light. ISO settings typically range from a low end of 200 to a high end of 3200 or more. Pro camera bodies often have the ability to select an ISO as low as 100 and go to 25,000 or higher. Generally speaking, the lower the ISO, the more pleasing the final image will be. As ISO sensitivity increases, noise becomes more evident in the image. At very high ISO settings, the amount of noise or grain visible in the image is substantial.

Aperture is the diameter of the lens opening allowing light into the camera body and onto the sensor. In aperture mode, rather than selecting the size of this opening, you actually select the ratio of the focal length of the lens to the aperture. This is referred to as the focal ratio or f/ratio. If you are shooting with a 50 mm lens or with a zoom lens set to 50 mm, and if the aperture is set to f/9, you know the lens focal length is nine-times the diameter of the lens opening or aperture. If you do the math, the aperture should be about 5.6 mm. Suppose you select an aperture setting of f/4.5, the lens focal length would be four-and-a-half times the aperture. That works out to roughly 11 mm. So, as the focal ratio gets smaller, the aperture or lens opening gets larger.

Finally, the length of the exposure is the amount of time the shutter is left open allowing light to hit the exposed sensor. This is also referred to as shutter speed. If your goal is to freeze a moment in time, you’ll want a short exposure or fast shutter speed. With a fast shutter speed, moving people or objects will appear stationary–frozen in time–but as the shutter speed slows, moving objects and people look more blurry. Keep in mind that there are situations where you will want to use a long exposure to capture blurred movement. Flowing water is one such situation. We’ll talk more about that a little later.

Now that you’ve taken an exposure in Auto and noted the settings, turn the mode dial to manual (M). Use the camera controls to set ISO, aperture (f/stop) and shutter speed to the settings you noted. Frame the same shot you just took and take another exposure. Then, compare this with the first frame. They should look very similar, if not identical. If you’re shooting outside in natural sunlight, any differences between the two images will most likely be attributed to a change in lighting conditions.

Let’s talk about the adjustments you might make to improve the overall look of the shot. If the shot you’ve been taking is a general wide shot of the room you’re in, you probably want to capture a good depth of field. In other words, you’ll want the lamp in the foreground and the chair next to that far wall both to be in focus. For good depth of field, you’ll want to select an f/stop in the f/8 to f/10 or f/11 range. The relatively small aperture will ensure objects both near and far will be in focus.

Suppose you really like that lamp in the foreground and you’d like to isolate it in a portrait. One way to isolate a subject in a portrait is to use a fast f/stop to create a shallow depth of field. Rather than shooting at f/9, you’re going to rotate the command dial to select an f/stop as small (fast) as your lens is capable of producing. Hopefully, you can dial in at least an f/4.5 or f/4 setting. If you can go as fast as f/2.8 or smaller, do it.

So, in which direction did you rotate the command dial and how many clicks did it take to settle on your desired f/stop? If you increased the f/stop (closed the aperture) then you’ll need to compensate by adjusting either the ISO or shutter speed. Increasing ISO will compensate for a large (slow)  f/stop by making the sensor more sensitive. A slower shutter speed will lengthen the exposure, allowing more light to pass through the restricted aperture to hit the sensor. if you adjust one or both of these settings in the proper direction by the same total number of clicks, you should be very close to compensating for the aperture change and creating a photograph that matches your expectations.

Which adjustment should you make? If you’re holding the camera by hand, you’ll want to use a shutter speed short enough to prevent any unsteadiness from creeping into the exposure. You can apply the reciprocal rule, in this scenario. The shutter speed should be no shorter than the reciprocal of the lens focal length. If you’re using a 100 mm focal length, you’ll want to shoot with a 1/100-second or faster shutter speed. The shorter the lens focal length, the longer your exposure can be when shooting handheld and still produce a sharp image.

The balance of the compensation can be made through changes to the ISO setting. Be aware that a significant increase in ISO to a setting of 1600 or higher stands a good chance of introducing unwanted noise or pixelation into the image. Of course, this is a situation where a tripod can be a godsend. If you’re able to mount the camera on a stable tripod, you can use shutter speed, alone, to compensate for a larger f/stop (smaller aperture) and still get very sharp images.

A silky water flow over Taliesin Dam at the Frank Lloyd Wright home in Taliesin, Wisconsin. (Bill Ferris)

A silky water flow over Taliesin Dam at the Frank Lloyd Wright home in Taliesin, Wisconsin. (Bill Ferris)

As mentioned, there are times when you’ll want to give priority to the shutter speed over the aperture. For example, a slow shutter speed (long exposure time) can enhance a photograph of a waterfall by giving the water a silky smooth texture. In this scenario, you’ll want an exposure of several seconds or longer. You can compensate for this by selecting a slow f/stop (aperture setting) of f/9 or f/11. Also, choose the lowest ISO setting available on your camera. And you’ll definitely need a tripod to produce a steady, sharp image with such a long exposure. If the resulting image still looks overexposed, try adding a polarizing filter to the front of the lens to further cut down the amount of light entering the camera. If the image is still overexposed, come back during that golden hour just before sunset to capture the scene at a time when the light level is reduced.

These are just a couple of ways you can begin to experiment with shooting in manual to give yourself more complete control over the photographs you make. It may not be something that immediately produces great results for you. But with time, patience and experimentation, you’ll gain a better understanding of how changes to the primary camera settings affect the final image. Ultimately, this is a path to having more creative freedom with your camera, taking better pictures and having more fun.

So, get out and shoot!

Bill Ferris | August 2013