This adapter allows using C-mount camera as a microscope eyepiece.

Usage is very simple - just screw the adapter instead a lens onto your C-mount camera, and insert cylindrical parts into the microscope eyepiece holder (diameter is 23.2 mm).

If you have a C-mount adapter for your digital camera with interchangeable lens, you can use your digital camera as well. Adapter doen't need to allow infinity - just mechanical coupling is enough.

Power up the camera, adjust focus of the microscope, and enjoy image on your monitor.