<<Because the photographer moves around so the subject fills the frame. With a telephoto lens that means the photographer is further away - *that's* what changes the perspective.>> Brian I'd have thought that all this was taken as read on a list like this. You'll be trying to convince people that focal length does not change when you switch from 35 mm to digital next ;o) I regret now raising the nit-picking point that for perspective to be preserved it is the entrance pupil and not the camera body that must be in the same place. I have come up against changes in perspective with focal length in close-up work for precisely that reason. If I had a digital back I'd run a couple of shots off to demonstrate. The discrepancy, trivial (albeit finite) for landscape photography but not so for close-up/macro, is that it is the position of the "eye" that needsto be constant not the position of the film plane. For a lens substitute entrance pupil for eye. For an exam you have to give the very slightly wrong answer expected rather than the VERY wrong answer sometimes found in magazines. Bob
