Tag Archives: bokeh

Shallow

A lone juniper tree clings to life on a stony outcrop overlooking Grand Canyon. (Lipan Point, South Rim) (Bill Ferris)

A lone juniper tree clings to life on a stony outcrop overlooking Grand Canyon. This photograph was made with a Nikon D610, Tamron 24-70 mm, f/2.8 VC lens at 60 mm, f/2.8, ISO 100, 1/800-second. (Lipan Point, South Rim) (Bill Ferris)

Depth of field is as important to photography as lighting and composition. Normally when doing landscape photography, I use focal ratios in the f/9 to f/16 range. Large focal ratios deliver images with great depth of field where objects in the fore-, mid- and background are all in focus. On a recent trip to the South Rim of Grand Canyon, I decided to experiment with using shallow depth of field and the above photograph is the result.

I was at Lipan Point, one of my favorite overlooks on the South Rim. From Lipan Point, you are treated to a fine view of Desert View and Palisades of the Desert to the east, and of Wotans Throne and Angels Gate to the west. I followed a social trail from the parking lot to a stone outcrop offering an unobstructed view of the canyon. Even on days when the light isn’t good for photography, the view from this little perch is still worth the 90-minute drive. In the truest sense of the phrase, the view from this vantage point is awe-inspiring.

The sun was low in the southwest sky and painted the surrounding landscape with a slightly warm hue. A small juniper tree clinging to its perch atop the Kaibab limestone was bathed in a wonderful rim light. As I set up my tripod and Nikon D610 to frame the shot, it occurred to me that this photograph should be a portrait of the tenacious tree.

In portraiture, wide open apertures and the associated small focal ratios produce shallow depths of field. This blurs everything not in the focal plane and helps to create separation between the subject, and anything in the foreground or background.

For the above portrait, I used the Tamron 24-70 mm, f/2.8 VC lens. I chose a composition that would include the distant South Rim, inner canyon temples and buttes, a short section of the Colorado River and the creamy late-day light streaming into Grand Canyon. This context clearly identifies the location of the portrait as being Grand Canyon. blurring the background allows the tiny juniper tree to be the subject of the photograph, the star of the show so to speak.

The tenacity of life in a desert environment is on full display, here. The tree clings to a rocky outcrop, a place where you might think a plant would have no chance of survival. But life is determined and defiant in such places. Water can pool in the small rough divots atop the limestone. And where water collects, life is almost always found.

The next time you head out with your camera, why not try something you don’t normally do? If you usually shoot with long focal lengths, try using a wide angle lens. If you often shoot with wide open apertures, make it a point to use a small aperture. Wherever your comfort zone may be, step outside it and try something new.

Now, get out there and shoot.

Bill Ferris | December 2014

Sports Photography

Wide angle zooms reach infinity focus within 2 to 3 meters, allowing you to freeze motion and achieve good depth of field even at the widest aperture. This image was shot at 16mm, f/4, ISO 4000, 1/500-second

Wide angle zooms reach infinity focus within 2 to 3 meters, allowing you to freeze motion and achieve good depth of field even at the widest aperture. This image was shot with a Nikon D600 full-frame DSLR using a Nikon 16-35mm wide angle zoom lens at 16mm, f/4, ISO 4000, 1/500-second. (Bill Ferris)

Sports and wildlife photography are extremely demanding of you, as a photographer, and your equipment. You are often shooting in low light, farther from your subject than you’d like–when it comes to wildlife, sometimes too close for comfort–and trying to capture a moving target. These are situations where your photographic technique and your equipment’s ability to make good images are pushed to the limit. In this blog entry, I’m going to focus on sports photography, offering some tips on how to capture compelling, dynamic images under challenging circumstances.

Battling for position beneath the basket. This image was captured at 70mm, f/2.8, ISO 2500, 1/800-second

Battling for position beneath the basket. This image was captured with a Nikon D600 and Tamron 70-200mm zoom lens at 70mm, f/2.8, ISO 2500, 1/800-second. (Bill Ferris)

Basketball is a sport which allows photographers to be relatively close access to the action. This doesn’t make the sport easy to shoot but it does make basketball easier to photograph than other sports. I used a Nikon D600 to capture all the images in this article. Sports photography is one area where a full-frame sensor, such as that in the D600, can give you an advantage over a digital camera with a smaller crop-sensor. The pixels on a full-frame sensor are larger than those on a crop-sensor DSLR body offering similar resolution. Larger pixels are more efficient. In other words, they do a better job of capturing light than smaller pixels. As a general rule, A full-frame DSLR will deliver at least a full stop of improved high ISO performance in comparison with a similar resolution crop-sensor body.

Why is this important for sports photography? If your objective is to capture a moment, your objective is often to freeze motion. (Please, note that freezing motion is not required for good sports photography. It is, however, a common practice.) To freeze motion, you need to take really short exposures, typically using shutter speeds between 1/500 and 1/1000 second. To make a good quality image at such fast shutter speeds, you’ll need two things: a fast lens and a camera with good high ISO performance. (Since flash photography is prohibited on the field or court, you’ll need to rely on your lenses and sensor to make the most of the available light.) Most sports photographers shoot with lenses offering fixed apertures of f/2.8 or faster. ISO settings are typically in the 1600 to 6400 range…sometimes faster.

In the above image, I was shooting at 70mm, f/2.8 using an ISO of 2500 and a 1/800-second exposure. If you zoom in to 100% on the full-size version of the image, you’ll see a slight touch of blur on NAU player’s right eye. Also, the reflected lights on his cornea are slightly elongated. Even shooting at 1/800-second, the image does not completely freeze the motion.

This image was taken with a Tamron 70-200mm zoom at 200mm, f/2.8, ISO 6400, 1/800-second

This image was taken with a Nikon D600 and Tamron 70-200mm zoom at 200mm, f/2.8, ISO 6400, 1/800-second. (Bill Ferris)

Another advantage of a full-frame sensor is its comparatively shallow depth of field. This advantage is due to the fact that crop-frame sensors effectively extend the focal length of a lens. Nikon’s DX format sensors have a 1.5X crop factor. In other words, any lens used on a DX format body will have an effective focal length 50% longer than it will on a full-frame or FX format Nikon body. The lens I used to take the above image was set to 70mm on my full-frame Nikon D600. On my crop-sensor D90, that same lens would have an effective focal length of 105mm and a correspondingly greater depth of field. The pleasing bokeh in the above image would not be as dramatic in images made with the D90. Objects in the distance would be more in focus, reducing the separation between the subject and the background.

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

This photograph was taken with the Nikon D600 and a Tamron 70-200mm at 135mm, f/2.8, ISO 3600, 1/640-second. (Bill Ferris)

Here’s an image that does a nice job of freezing the action. If you zoom in to view the image at 100%, you’ll see the NAU player’s eyes are in focus. This is the number one rule of good photography: focus on your subject. When shooting basketball or another sport where the athlete’s face is in view, you should focus on the eyes. How do you know if you’ve succeeded? Look at a 100% view of the the eyes in the original image. If light reflected off the cornea is sharp and well-defined, the image is in focus. If the eye is soft or fuzzy, the image belongs in the recycle bin.

A technique I use to achieve good focus is called, Back Button Focus. Back Button Focus (BBF) moves the auto focus function of your DSLR from the shutter release button to the Auto Exposure Lock/Auto Focus Lock (AE-L/AF-L) button, typically found on the back of a DSLR body. Why do this? Most DSLR shutter release buttons allow you to activate auto focus with a half-depression of the shutter release button. To take a picture, depress this button fully to actuate the shutter. When shooting sports, there is an advantage to separating auto focus from shutter release.

Taken at 200mm, f/2.8, ISO 6400, 1/800-second

Taken at 200mm, f/2.8, ISO 6400, 1/800-second. (Bill Ferris)

In the above photo of NAU men’s basketball head coach, Jack Murphy, he was squatting while speaking to his team. The distance from him to my camera wasn’t changing. In that situation, I used the AE-L/AF-L button to set focus on his eyes, then waited for him to turn and face me before taking the exposure. If the Shutter release button also triggered the camera’s auto focus function, taking the picture may have reset focus on another person in the frame, ruining the picture.

Another advantage of moving auto focus to the AE-L/AF-L button is the potential to extend the battery life of your camera. If you shoot with vibration reduction (VR or VC) lenses, that half-depression of the shutter release button will activate the vibration reduction motors. The VR motors draw additional power from your camera’s battery. Using the AE-L/AF-L button for auto focus allows you to wait longer before engaging VR, which will extend your battery life.

200mm, f/2.8, ISO 5600, 1/800-second

D600 with Tamron 70-200 at 200mm, f/2.8, ISO 5600, 1/800-second. (Bill Ferris)

So, how do I set up my camera for a sports photo shoot? First, I put the camera in full Manual mode. Why? Well, I know there are two factors over which I want total control. The first, is aperture. I want to use my lens’s widest aperture. This maximizes the amount of light falling on the sensor, which allows me to make a good image using short, fast exposures. A wide open aperture also delivers images with beautiful bokeh, creating clear separation between the subject and surrounding environment. The second factor I want to control, is shutter speed. If I’m trying to freeze the action, I’ll choose an exposure of 1/500-second or faster. You’ll notice many of the images in this article were taken with exposures of 1/800-second.

Having selected the aperture and shutter speed, I will then engage a setting I rarely use: Auto ISO.  When doing landscape and portrait photography, I generally select a low native ISO setting of 100 or 200 to reduce noise in the resulting photograph and maximize image quality. Sports photography is one of those scenarios where you need to use–and trust–the camera’s high ISO capability. Selecting Auto ISO allows you to concentrate on framing, focus and when to push the shutter release button. You can choose to manually control ISO and, to be honest, many photographers are able to make ISO changes on the fly without missing a shot. Personally, I prefer to keep things simple and Auto ISO reduces the number of critical variables I have to monitor. Of course, this technique is only as good as your DSLR’s ability to meter and select a proper ISO.

D600 with Tamron 70-200mm at 200mm, f/2.8, ISO 5000, 1/800-second

D600 with Tamron 70-200mm at 200mm, f/2.8, ISO 5000, 1/800-second. (Bill Ferris)

With the manual settings in place, I’ll then double-check my camera’s auto focus setting. For landscapes and portraits, I use Nikon’s Auto Focus Single-Servo (AF-S) mode and choose a single auto focus point. In a nutshell, the AF-S mode tells the camera to set focus just once and lock that in place until the shutter is actuated. Landscapes don’t move and, in many portraiture settings, your subject is not moving. So, AF-S is a mode that allows you to precisely set and hold focus. Choosing one auto focus cross-point gives you further control over these critical factors.

Sports photography is a different animal, altogether. Since your subjects are moving, it’s generally better to select Auto Focus Continuous-Servo (AF-C) and a cluster of cross points where your subject is most likely to be within the frame. With AF-C selected, my D600 offers options of 9, 21 or 39 cross point clusters to predictively track and follow focus. This illustrates another advantage of assigning auto focus to the AE-L/AF-L button. With my right fore finger resting atop the shutter release button, my right thumb is able to depress and hold the AE-L/AF-L button to engage continuous auto focus. When I’m ready to take an exposure, I press the shutter release button.

D600 with Nikon 16-35mm at 16mm, f/4, ISO 5600, 1/640-second

D600 with Nikon 16-35mm at 16mm, f/4, ISO 5600, 1/640-second. (Bill Ferris)

Burst rate is another setting I’ll adjust prior to the game. Again contrasting sports photography with landscapes and portraiture, shooting constantly moving subjects is a scenario where your camera’s high speed burst rate is a real asset. Over the course of one or two seconds, a basketball player can go from the top of the key to leaping and finishing with a layup kissed off the glass or a monster dunk. My D600 has a maximum continuous burst rate of 5.5 frames per second. That’s one frame about every 0.2-second. If you have any doubt about how much can happen in two-tenths of a second, review a short burst sequence. In that collection of 5 to 10 images, there may be one where the player’s face is visible, the ball is visible, focus is pin sharp and framing is perfect. The other images may be soft in focus, poorly framed or have some object obscuring the subject’s face. I don’t recommend holding down the shutter release for seconds on end. But a well-timed, one-to-two second burst at your DSLR’s fastest rate can go a long way towards ensuring you get the shot.

Nikon D600 with Tamron 70-200mm at 200mm, f/2.8, ISO 6400, 1/800-second

Nikon D600 with Tamron 70-200mm at 200mm, f/2.8, ISO 6400, 1/800-second. (Bill Ferris)

Let’s talk about subject matter for a moment. Certainly, the primary objective of your photography will be to capture the critical moments and plays in the game. But sports are about more than just the action on the field or court. It’s also about what’s happening on the benches, in the stands and on the sidelines. The above image has nothing to do with the final score. But it captures a genuinely personal moment among the players on the Northern Arizona bench. If you didn’t attend the game, you probably don’t know what the final score was. However, seeing this image, may give you a clue. NAU dominated. They led by twenty or more points throughout the second half and won by that same margin. Hence, the players on that bench felt comfortable sharing a light moment–a bit of humor–before the final buzzer sounded.

200mm, f/2.8, ISO 4000, 1/800-second

200mm, f/2.8, ISO 4000, 1/800-second. (Bill Ferris)

Finally, I’ll share a few thoughts on lens selection. I brought three lenses to this shoot: Nikon 16-35mm, f/4; Tamron 24-70mm, f/2.8 and Tamron 70-200mm, f/2.8. All are zoom lenses with vibration reduction. The two Tamron lenses are fast, with fixed f/2.8 apertures throughout their zoom ranges. The Nikon 16-35mm is one stop slower at f/4, which would normally be a significant limitation in this setting. However, the excellent high ISO performance of the Nikon D600 body allowed me to freeze the action with this ultra-wide angle zoom.

Of the three, if I had to choose just one to bring to a basketball game, it would be the 24-70mm, f/2.8. It’s wide enough to frame players, head-to-toe, beneath the basket and long enough at the 70mm end to isolate a player from the waist up. The 70-200mm, f/2.8 would be next in my bag. The reach of this lens allows me to get up close and personal, filling the frame with the face of a coach or player. It also allows me to follow action on the far end of the court. In fact, if I were limited to just one lens for all sports shooting, it would be the 70-200, Sports like football, baseball and soccer are played on larger fields that demand a longer zoom range to bring the action closer to you, the photographer.

This photo was taken with a Nikon D600 and Tamron 70-200mm combo at 200mm, f/2.8, ISO 4500, 1/800-second

This photo was taken with a Nikon D600 and Tamron 70-200mm combo at 200mm, f/2.8, ISO 4500, 1/800-second. (Bill Ferris)

In summary, the key to successful sports photography is freezing the action. The tools that allow you to do this are a camera body with very good high ISO performance (advantage: full-frame sensor), fast lenses (f/2.8 or faster), and an auto focus system that accurately tracks and predicts focus on moving subjects. Shooting in manual allows you to control at least two critical settings: aperture and shutter speed. Using the camera’s Auto ISO feature can simplify things for you. Using your camera’s continuous auto focus setting and moving control over auto focus to the AE-L/AF-L button are an asset to achieving accurate focus. Focus on the eyes of your subject. If the eyes aren’t in focus, the image belongs in the recycle bin. When you’re ready to shoot, a well-timed short burst will help to ensure you get the shot. And finally, capture images that tell the full story of the event, including action around the court.

Now, get out and shoot!

Bill Ferris | November 2013

 

A, Is for Aperture Priority

I don’t recall exactly how long it took before I was able to look at the letters on the menu dial of my camera and see anything other than alphabet soup. It certainly wasn’t overnight after first getting the camera, weeks at a minimum but probably closer to months.

In part this was due to the ability of the modern DSLR camera to auto select settings that produce good photos. Another factor was the menu of scene modes on my Nikon D70. When taking pictures of people, I used the Portrait setting. I also used the Landscape, Sports and Night settings. The names said everything I needed to know about their function and made it easy to explore settings other than Auto. Yes, I was getting all radical with my camera and trying different menu dial positions just weeks after getting it.

But the real experimentation started when I took the leap of faith required to dive into the alphabet soup settings on the menu dial: A, M, P and S. In addition to being an anagram for, spam, those four letters tease and temp a new photographer with hints of the unknown and mysterious. What happens when you choose, A? Will the camera even function?

The Command Dial on most DSLR cameras allows you to choose between a variety of scene and other settings, including Aperture Priority (A)

The Command Dial on most DSLR cameras allows you to choose between a variety of scene and other settings, including Aperture Priority (A) (Graphic used courtesy Creative Commons)

A, is for Aperture Priority, a setting where you manually select the aperture and the camera fill in the other settings. An aperture is an opening that allows light to pass through the lens and fall on your camera’s sensor. If you’re framing a shot at high noon on a sunny day, there’s a lot of light hitting your subject. This abundance of ambient light means your camera’s aperture can be small and still allow enough light to hit the sensor to capture a beautiful image with a short exposure. This brings us to the concept of f-stop or f/ratio. These terms mean the same thing, the ratio of the focal length of your camera lens to the diameter of the lens opening (aperture) allowing light to fall on the camera sensor.

Suppose your shooting with the kit zoom lens that came with your camera and the focal length (zoom) is set to 50 mm (millimeters). Put the camera in auto and take a picture of something. Then, play the photo and look at the information about that exposure. In particular look for the f-number. The number next the f tells you the ratio of the aperture to lens focal length. A picture taken with a 50 mm lens at f/10 had a 5 mm (1/5-inch) aperture. A picture taken with a 50 mm lens at f/4 had a 12.5 mm (1/2-inch) aperture or opening.

So, the smaller the focal ratio or f-number, the larger the aperture. In short, when you shoot with a small f-number, you’re letting more light into the camera to fall on the sensor. Or at least, your camera is trying to let in more light. When we started this discussion, we began by imagining a scenario of taking a picture at high noon on a sunny day. Let’s change the time from high noon to the golden hour, that first hour after sunrise or last hour before sunset when natural light is soft, warm and dramatic. The light quality is better but there’s not as much of it. So, in order for your camera to allow the same quantity of light on its sensor as a shot taken at noon, the aperture needs to be larger.

The begs the question, so what? Why should you care that the aperture needs to be bigger during the golden hour than at high noon? Well, aperture determines the depth of field in a photo. Depth of field is the range of distance within which objects or people will be in focus in a photograph. When shooting portraits, it’s often more pleasing to have a shallow depth of field. In other words, the person who’s the subject of the photo is in focus but anything in the foreground or background will be out of focus. This quality of an out of focus foreground or background is called, bokeh. Bokeh is a Japanese term describing the portion of a photograph that is obviously out of focus. When shooting a portrait, obvious bokeh in the background is typically very pleasing to the eye. The way to create bokeh in your shot is to shoot using a small focal ratio or f-number, the smaller the better.

Northern Arizona's summer monsoon calls forth brilliant yellow wildflowers near Flagstaff, Arizona. (Bill Ferris)

Northern Arizona’s summer monsoon calls forth brilliant yellow wildflowers near Flagstaff, Arizona. (Bill Ferris)

Above, is an example of bokeh. The subject is in focus in the foreground and the background is obviously out of focus. This transforms the background flowers into a pleasingly abstract tapestry of hues and textures complimenting the subject of the photo.

Suppose you’re shooting a landscape at sunset. A wonderful, warm light is painting the temples and buttes of Grand Canyon. For this shot, you’ll probably want everything in your frame to be in focus. You’re not trying to capture just one temple or butte. Everything in your frame needs to be in focus. In this scenario, a shallow depth of field will put much of the frame out of focus. To put everything from the most distant butte to the blooming foreground wildflower in focus, you need to shoot using a large focal ratio. Typically, I shoot at f/9 when doing landscape photography.

 (Bill Ferris)

The last light of day paints Desert View Watchtower on the South Rim of Grand Canyon a deep rusty red. Desert View overlooks the Palisades of the Desert and the Colorado River in eastern Grand Canyon National Park. (Bill Ferris)

This photo of Desert View Watchtower on the South Rim of Grand Canyon was taken at sunset. My Nikon D90 was mounted on a tripod. The camera was in aperture priority at f/9, ISO 500, a lens focal length of 19 mm and an exposure of 1/30-second.

This brings us to the final question of this blog entry. What impact, other than depth of field, will shooting at f/9 have on your photo? As we’ve discussed, the larger the f-number the smaller the aperture or lens opening. If shooting at sunset to capture a landscape illuminated by that gorgeous, soft light, you can compensate for the small aperture by boosting the ISO setting. The same scene that can be captured with an ISO of 200 at high noon, may require an ISO setting of 800 during that dusky time around sunset.

But there is a price to pay for taking this approach. Boosting the ISO to make your camera more sensitive to light adds digital noise to your photo. With higher end digital cameras, images shot at ISO 800 often look very good. But if you’re shooting with an entry-level camera or an older DSLR, an image shot at ISO 800 will often looking grainy and rough. Rest assured, however, there is another solution.

Use a tripod. For landscape photography or any photography where you want to capture sharp, detailed images with good depth-of-field, a tripod is essential gear. Mounting your camera on a tripod allows you to precisely frame the shot. It also allows you to shoot at low ISO’s of 400 or less during the golden hour and still capture great detail. The scene that was perfectly captured with a 1/500-second expose in bright sunlight may require a 1/10-second exposure at a time of day when the quality of the light is warmer, softer and more dramatic.

Now, 1/10-second may not seem slow but trust me, it is slow in photography. As a general rule when shooting handheld, you want exposure times to be no slower than the reciprocal of the lens focal length. OK, in English. Let’s say you’re shooting with a 50 mm lens. If you’re holding the camera in hand for the shot, the slowest shutter speed you’ll want to use is 1/50-second. Faster would be better. Any slower speed will allow the camera to capture the vibration or unsteadiness of your handhold. That vibration will soften details and produce an image that looks out of focus. If the camera is mounted on a tripod, that rock solid platform will allow you to take longer exposures producing crisp, focused photographs.

OK, I’ve rambled long enough. The next time you’re out with your camera, experiment with using the A or aperture priority setting. Shoot the same subject using different apertures. Compare the ISO settings and exposure times for the resulting photos. Most important, compare how the photos look. Which one looks best to you? Write down or make a mental note of those settings and spend the rest of the day shooting with them. You’ll learn a little more about your camera and you’ll get some great shots.

Get out and shoot!

Bill Ferris | August 2013