A couple of months ago, the lens mount broke on my old Pentax K2000. It wasn't worth it to repair it so I bought a new camera instead. It had been collecting dust, until now. I decided to make it into a pinhole camera! At first I used some printer paper but I found that it let in too much light that wasn't from the hole. So, I moved on to something a little thicker, cardboard. After about an hour of fiddling and a couple feet of duct tape, I got it just right. I haven't used it for long, so I will be looking for its focal length and so on in the coming days.