One of these can be pinhole or single-lens reflex
The following 
technique can be used to create a pinhole camera out of any regular film camera 
that... [DOC] [TLE] Single Lens Stereo with a Plenoptic Camera - Persci - MIT [PAR] infer the depths of objects in the scene, i.e., one can achieve ... (a) Pinhole 
camera forms an image from a single viewpoint; (b) in a ... through all of the 
different positions of the lens aperture.