2 inch to M42*0.75 Telescope Mount Adapter+T2 Ring for Nikon SLR Cameras
Adapter Male Thread: M42 0.75. 1 Piece 2" to M42 0.75 Adapter. Compatible Lens: for Nikon T2/T Mount Lens. 1 Piece T-Ring Adapter for Nikon. The inside of the adapter is fully threaded to minimize reflections.