Use T-mount lenses on C-Mount video cameras $30 shipped
This is a T-mount to C-Mount adapter that lets you use any T-mount Lens on your C-Mount video and CCD cameras. It can also be used to mount your video camera securely to any T-threaded scope accessory like focal reducers, flip mirrors, etc. to eliminate the risk of dropping your camera when you "adjust" the focus by turning the diagonal's set screw.
I am raising money to cover the earnest money for a house I have bid on, so I need to do paypal on this one.