I have ordered a dozen drill bits as fine as frog hairs to drill pin hole lenses. Well drill lens boards for pin hole use. So I started to look around for a camera to build for myself. I found an old polaroid model 80 aka highlander. I bought it with the intention of making cut film negs with it, but it had a terribly poor lens. Not at all like the full size 'roids, but it had a good strong shutter. SOOOOO I took it apart, removed all the glass and fitted a cut film holder inside the existing back oafter some minor modifications ( we like to avoid saying I gutted the back almost completely. Using an autobody hammer and a cheap screwdriver).. When the bit comes I am going to have one nice 2x3 film shooting pin hole camera. While doing this I found out how you figure the siZe and fstop of the pinhole. amazing what you can find on the net.