If you need to figure out what size pinhole you have, one way is to scan it at high resolution on a flatbed scanner and count how many pixels wide the hole is. You’re welcome to come use my scanner for that, if you need to.

I’m kind of surprised the popcan didn’t work, but perhaps it was how the hole was made and finished.

I suppose I could take another whack at it.

On processing: I like 35 mm film for ease of handling. I don’t know anything about 120. I think this would be a good way to learn and I expect a cheap 120 camera can be had at a variety of places.

Thanks for the advice.

I got my .001 shim stock from tacoma screw and then got some super fine grit sandpaper and then punctured the shim stock with a needle just a bit and then sanded the bump on the other side and poked it a little bigger from the other side followed by more sanding. I think I had to buy a whole roll of it for like $15 or something. Having a smooth hole helps.

If you are thinking about developing film, you might take the easier route of developing paper as a film. You only get one shot per camera per setup, but if you’ve got the chemicals set up, you get instant feedback (well a few minutes) and then shoot again. You can also make your own camera boxes and that’s fun and it’s a lot easier to scan in 8×10 pieces of photo paper. You can also get a lot better resolution because film is so tiny. I don’t think you get as much latitude as with film, but I really liked it.

If you’re going to do film though, find yourself an old 120 fold down camera and convert it. I think it’s easier to develop than 35mm. If you don’t want the chemicals. I remember you can develop yourself with the chemicals at the photo center northwest for just a few bucks a roll. (I seem to remember that it was $2 a roll.)

So forget what I said and look at the pictures.