Amazon.com : Gosky Metal 1.25'' Telescope Camera T-Adapter and Nikon T2 T-Ring Adapter for Nikon DSLR SLR (Fits Nikon D90, D80, D70, D60, D50, D40x, D40, D800, D700 and All Nikon SLR
Amazon.com : Starboosa Telescope Camera Adapter - for Prime-Focus Or Eyepiece-Projection Photography - Camera Adapter for Nikon SLR Camera : Electronics