Gus Gus , Mar 27, 2006; 09:19 p.m.
I sit my subject 5 ft. from the background. I set my backlight just behind the subject on a very short stand. They make stands for that. Using barndoors on the light, I aim the light at the background at the same height as subjects head. If I am using a f8 exposure then I will use f8 on the background light. If you want the background to be lighter, use more lite on it. If you want it to be darker use less lite on it. Gus.