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Learning to use off-camera flash allows you to create and shape light, giving you plenty of new opportunities for dramatic photography.
But for many photographers, starting up with flash can be intimidating. It’s not just a matter of aiming a flash at your subject and hoping for the best. Choosing the wrong angle or positioning for your flash can have a negative effect, casting unflattering or irregular shadows.
I remember when I was starting out with off-camera flash I would sometimes get images where the light simply didn’t look right. But when it’s used effectively, flash adds to an image – it shouldn’t make the lighting seem unnatural or otherworldly (unless, of course, that’s the effect you’re going for – to each their own!).
But where’s a good place to start? Where should you put your flash in order to get good light? This article will show you one method you can use called cross lighting that you can use to create dramatic images with off-camera flash.
For both beginners and pros alike, cross lighting is a very quick and simple setup that results in a dramatic, well-lit shot.
Like the name implies, this setup features two light sources on opposite sides of the subject. Hitting your subject from both sides adds a sense of depth to the image, while still producing natural-looking light.
Typically you want your light that will provide the most illumination, also know as the key light, placed in front of the subject and a bit to one side. For portraits, you will typically want to use a modifier on your light, such as a softbox or umbrella. This isn’t a requirement – but it will help soften the shadows and create more flattering light on the subject.
The purpose of this key flash is to light up the subject’s features and put a sparkle of catch light in their eyes.
The second light is placed behind the subject on the opposite side as the first one. The purpose of this light is to create an “edge” of light around your subject. This is traditionally called a “rim light” or a “separation light” since it helps to separate the subject from the background.
Voila! This quick setup is an easy way to get started and start exploring the creative potential of a shoot. As you begin to snap pictures, you may find something about your setup that you want to change, but the cross lighting gives you a solid foundation from which to build.
One of the reasons I love using this setup for off-camera flash is that it takes away the guesswork and provides a solid foundation of light that you can then begin to work with and modify.
And also that it takes only moments to set up! When you start lugging around multiple flash units, light stands, and modifiers, it’s nice to have a consistent starting position that provides even lighting.
It’s a good idea to get the correct flash power for your key light dialed in before adding your second flash. Trying to figure out the correct outputs for two lights at the same time and adjusting in your camera on the fly is a recipe for a headache.
One of the reasons this setup is so easy and versatile is because you don’t necessarily need to use two flash units – the sun can step in as either your key or secondary light.
This approach is particularly effective at golden hour. As evening falls and soft, warm light floods across the fields, you have a ready-made separation light. Many natural light photographers are already familiar with this and use this rim light in their shots.
The benefit of adding an off-camera flash as a key light is that you can create a much more dramatic image with dark, rich colors. Colors lose their vibrancy as they get brighter. By keeping the exposure low and using your off-camera flash to light up your subject, your background can be full of vivid contrast and color.
The sun doesn’t always have to play second fiddle to your flash. You can create the same effect by using the sun as your key light – coming in at your subject from a slight angle – and then using your off-camera flash as the rim or separation light.
The biggest drawback here is that you can’t adjust the power of the sun quite as easily as you can on the back of your flash! However, taking the time to learn how your camera settings can make a picture darker or lighter, and how you can use this skills in conjunction with your off-camera flash, will give you allow you to build the shot you want.
Here’s the last variation of this setup. By setting up your off-camera flash on one side of the subject and angling a reflector just right on the other, you can mimic the effect of two light sources. This approach might take a bit of practice and a steady hand, but it’s a fun way to learn what you can accomplish as you learn how to control light.
Learning to maneuver and shape light is a fun challenge. Being able to quickly and reliably get top-notch results with flash is an important aspect of photography – especially if your model or clients are waiting impatiently for you to get your lighting figured out.
By starting with cross lighting and working from there, you have a reliable method for nailing some great shots. Please share your comments, questions and cross lighting images in the comments section below.