Pinhole Mount for Canon DSLR Body Cap

thingiverse

I mounts an ebay-bought laser-drilled 0.3mm pinhole disk in the body cap of a Canon 5D camera. The body cap fits perfectly on any Canon DSLR. I bought the pinhole disk for $19 and it's 19mm around and 0.6mm thick, so you'll need to adjust the SCAD file if you're using something else. To mount the pinhole disk, I drilled a 5/16" hole in the center of the body cap. The hole isn't critical because the pinhole is centered by the pinhole disk and the printed holder. I press the pinhole disk into the mounting disk and then the disk into the body cap, with the pinhole disk against the cap. If needed, glue can be used or an O-ring between the pinhole disk and the cap. If printing on glass, you'll want to paint the bottom of the mounting disk flat black to avoid reflecting light. I printed on tape and the surface was matte enough.