Camera to Instrument Mounting
From Pvdwiki
The first decision that must be made for mounting a camera to a telescope, microscope, or some other type of instrument is wether the camera is going to be connected from it's lens or directly to the frame.
If you are connecting directly to the frame you will need a T-Ring. For my Canon 30D, I needed to order an Orion #05224 ring. It's a cheap part.
