If I am going to shoot some actors in front of a green screen in a documentary style interview, what lense should I use?
What camera are you using?
Light it bright, stop down the aperture and increase your DOF. You want the entire foreground to be in focus.
Why not just start with the lens that came with your camera and see if it'll work? Hmm?
I decided to isolate the actors in light and keep the background black.