Right now I am exploring Pinhole photography, and a lot of my posts will be discussing this topic. All of my cameras are made from the holiday tins you get every year that have popcorn, candy, or cookies in them. I have four right now, three are cylindrical, one is rectangular. For all of my tins, I drill a 1/4 – 1/2 inch hole in one side, and over that hole, I place a thin piece of copper plate that has a pinhole in it. I then spray paint the insides with a matt black to reduce reflections. There are many ways to make a pinhole camera. This is just how I do it. I have been using Arista Halftone Ortho Litho film in my two bigger tins, however, in my two smaller tins I plan on using 35mm and 4×5 inch film. The Litho film is easy to use because I can process it like black and white paper. It is very contrasty, though, which can be a good and a bad thing, depending on what I am going for.
Here is a good explanation of pinhole photography.
See my pinhole images here.