I've done several adaptations using body caps. These include a 50mm macro lens from a 35mm Mamiya ZE, and lenses in shutters from old Ansco and Kodak folders; these are often around 100-140mm in focal length. I have access to a drill press so I was able to cut the exact size hole for each lens.
EDIT: The way I mounted the 50mm macro lens was by drilling holes in both the Mamiya RB body cap and the rear cap for the macro lens, and then gluing both caps together. The macro lens was simply mounted on the lens cap. It did cover 6x7 with no problems at macro range.
Last edited by rthomas; 11-11-2012 at 10:26 PM. Click to view previous post history.