I'm trying to figure out how to mount my solid catadioptric lens to my Nikon D3100 DSLR. The lens is a Vivitar Series 1 600mm f/8 catadioptric lens. Are there lens adapters that would facilitate this? Also, although I can't see why it wouldn't, will the camera work with this lens? The lens is entirely manual. Finally, would it be possible to use a tele-extender with this lens/camera combination? If so, what would be good recommendations?