Camera Adaptor For Telescope Using A Telescope With A SLR Camera?

Using a telescope with a SLR camera? - camera adaptor for telescope

Has anyone ever had a telescope with a SLR camera, and if so, what are the results of comparable quality. Telescope for use as a Leica APO Televid 77 with a Nikon digital SLR camera. The adapter of the photo is a 35-mm equivalent of 800mm in F10.4. Ideas or alternative suggestions would be greatly appreciated.
Thank you for your patience