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Off-Camera Flash; Controlling The Direction Of Light Bookmark and Share

On-camera flash has a bad reputation—and for good reason. In fact, many photographers are turned off to using flash altogether because they don’t like the look of pictures taken when the flash is sitting on the camera. The images look flat, dimensionless, and many subjects look “pasty” with this kind of lighting. The photo of the young Balinese dancer (#1) is an example. Even though I like the shot, the lighting is not artistic or special in any way, and the girl’s face seemingly has no depth to it. The same is true for the Kathakali dancer from India, (#2). He was a remarkable subject, but the flat lighting is not very inspiring. No matter the subject, on-camera flash produces the same kind of two-dimensional light as you can see again in the picture of a Jackson’s chameleon, (#3).

#1
#2

On-camera flash is very convenient. It’s simple to use especially when using it in Automatic mode, and it’s available at a moment’s notice to light up a dark scene. Without the flash, the high ISO settings you would be forced to use would degrade the quality of your pictures.

#3
All Photos © 2010, Jim Zuckerman, All Rights Reserved

The solution to these problems is simple. Take the flash off the camera and use it to the side, behind the subject, or at some angle to the lens axis. This will immediately address the issues I’ve just mentioned. In addition, it adds artistry to the composition that makes all the difference in the world.

There are various methods for using off-camera flash. Some flash units have a socket to accept a PC cord that connects the camera to the flash. Although the cord can get in the way at times and its length limits the distance you can use to separate the camera from the flash, it can be convenient.

Like TV remotes, flash units can also be used wirelessly. Canon, for example, has a unit called the ST-E2 that will work with both Canon and Nikon cameras to trigger the remote flash wirelessly. It works on an infrared beam, and that means that the ST-E2, which sits in the camera’s hotshoe, must be able to “see” the flash to make it fire. A Pocket Wizard, on the other hand, works on a radio signal. Line-of-sight is no longer an issue, and that gives you far more creative potential. For example, the flash can be used as a backlight since the unit sitting in the camera’s hotshoe doesn’t have to see the unit connected to the flash.

Nikon uses the Commander mode to fire off-camera flash units. In the Custom Settings menu, you choose the Commander option, and then you can control one or more flash units off–camera. On some Nikon models, the built-in speedlite serves to trigger the flash units providing the light for your subject.

As an example, compare the lighting in the photo of the juvenile alligator (#4) with the way the Jackson’s chameleon is lit in (#3). In the picture of the gator, the light was positioned at a 90˚ angle to the lens axis in front of the reptile’s snout. The light skimmed the surface of the skin creating pronounced texture and amazing detail. We don’t see an unnatural dot of light in the eye, and the play of light and shadow is beautiful. There is a sense of dimension where we can see the contours of the animal’s head very clearly. By contrast, the chameleon photo doesn’t show any of the contours at all.

#4

Now compare photos (#5 and #6). The picture of the two models was taken with an on-camera flash and it’s not bad. The color is good, I like the composition, and the background being darker than the subject works for me. However, the lighting on the two people is flat and commonplace. The picture of the model in blue and white, on the other hand, is dramatic. I had a friend hold the flash off to the side at about an 80˚ angle to the lens axis. The edge lighting separates the model from the sunrise background and gives this picture a great deal of dimension. This is one of my favorite pictures from Venice simply because of the side lighting. I fired the flash wirelessly with Canon’s ST-E2 wireless trigger.

#5

#6

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