I made a C-Mount to 1.25" telescope adapter for an old industrial CMOS camera. The C-Mount adapter fits the threads of the camera like a glove.

I printed it on an original Prusa MK3 (nonS). I also added the Fusion360 and STEP files in case you need to change the tolerances of the thread for your own printer.

I used 0.20 mm layer height for the body and with the height range modifier inside of Prusa Slicer I set the layer height to 0.10 mm for the thread. Use the included 3MF file to export your GCODE if you use Prusa Slicer.

Btw. the moon pictures where captured by an even older CMOS camera module from my other adapter design. More infos on my blog at https://www.schweinert.com/blog

Happy printing!