If you look at the Starlight Camera website www.paintcancamera.com you'll find a new pinhole camera called the Merlin XD that's made from a film developing tank so the chemistry can be added right after the exposure. I've been working on this for about 2 years and have actually filed a patent for a camera that is resistant to chemicals, but that's for commercial purposes. For personal use you might try:
a) the same idea - use epoxy to add the pinhole after you drill a pilot hole b) the cap for 35/120 film stainless steel developing tanks fits on a 3" ABS or PVC pipe... you have to work with tools and alter the cap & wall to get the flow right, though c) use a plastic 35/120 developing tank... you must make it light tight by filling the hole used for pouring the chemistry into the tank... then you have to figure a way to get the solutions into the tank... this was easily solved by cutting a 3" tube from a 1 liter plastic Sprint chemistry container and fitting it over the top like a chimney d) use black electrical tape as shutter in all of the above and stainless steel for the pinholes Jim K
