A simple but neat little pinhole camera, laser cut from 3mm ply. Different frames are provided to give a circular or rectangular image. The camera is intended to be used with paper negatives. The photographic paper is pinned behind the frame and then the two halves of the box are pressed together.
The Adobe Illustrator file for laser cutting and SketchUp model are given below. You can make the pinhole from brass shim or other thin metal sheet. For this focal length (24.4mm) the optimal pinhole diameter is 0.2mm.
I’ll post a few images made with this camera soon.