I've just purchased an SBIG ST-2000XCM CCD and would like to start out with it wide field using my Nikon lenses.
SBIG CLA-7 with Nikon mount is the adapter I need. Also wouldn't mind the SBIG male-male t-mount adapter that allows using a 1.25" filter witht the adapter.
I'd also consider some other adapter with female Nikon F-Mount to male t-mount.
I could also use the t-thread ring 50147 that fits into the D-plate. It looks to be thinner than the default t-thread with filter thread that I have now, and the extra back focus would open up some options. Actually, maybe the thinner t-thread ring is needed even for SBIG's lens adapter.