I am shooting a commercial and the director has requested using a mirror to shoot into. The shot is a 2 shot of a man on a sofa, and his friend sitting on a sofa next to him. The room is a bit small, perhaps 12'X12', and the physical space the camera would have to be in for this two shot would put the lens at about a 40mm. However, if we come off axis (into an adjoining room) and shoot into a mirror (placed, I am assuming, approximately where the original 40mm camera position would have been) i can get onto a much longer lens, thus getting a sexier shot of the same 2 shot.
He has worked with a D.P. in the past who utilized this technique...however, in my 18 years in the camera department, I have never witnessed it so i'm looking for advice on technique, mirror size, problems/opportunities...
Anyone mastered this mirror shooting situation?
Thanks for your help!