logitech c920 c mount microscope adapter and box
logitech c920 cs mount microscope adapter and box

a simple box that can hold the internals of the c920 webcam and offer a c or CS mount for it.
I am trying to do a microscope camera out of my old C920 camera and so far it looks good!

there are two extra files that allow you to have a small square to circular shape adapter to the disassembled C920 in case you would like to keep the original lens assemby.