Ed, I have a Calumet monorail wide angle 4x5 view camera. It will take a 47mm on a flat board, has only about 7"-8" of bellows, so could be used with a 135 or 150 lens as well. I picked it up on the bay for the lens that came with it(a really sweet, late model, Schneider 120mm Angulon) I am thinking of putting it up on Ebay as I really have no use for it. Kirk Gittings refered to this model as his prefered camera for wide angle work in architecture in a recent thread.