So far there have been a few discussions of lenses, with some good leads on cheap glass. One hitch is what to do about a shutter. With glass instead of pinhole the exposure times get short enough that using a lens cap isn't very practical. I guess one can always locate a Speed Graphic and use the focal plane shutter with homebuilt lenses, but that limits the format a bit and a SG in good condition isn't all that cheap anyway. Using a shutter off an old folder can be a problem because of vignetting caused by the thickness and small bore of most folder shutters. That might be avoided by mounting the shutter between front and rear elements, just like on "real" lenses, but that creates mounting problems.

Has anyone given much thought to homemade shutters?