Here is an initial drawing of my design for a 120 pinhole. I am trying to get a compact design this time by using a bellows on the front of the camera.
The idea is that the bellows will be extended and collapsed.
The bellows will also be hand made.
When the bellows are collapsed you have a thin wooden slip box that slips over the entire camera, very neat and small in size.
Other designs and videos will follow this initial idea and sketch.