Set That Converts C-Mount (Female threaded) / Eye tube to a 23.2mm / 30.5mm
Work great for your USB Digital Microscope Camera that doesn’t have a C-Mount threaded or SLR/DSLR Digital
Easy to install just screw it into your C-Mount Photo Tube
Or insert 30.5mm
Sleeve Adapter into the Stereo Microscope Eye Tube.