2" to M42*0.75 Telescope Eyepiece Mount Adapter + T T2 Ring for DSLR
Adapter Male Thread: M42 0.75. 1 Piece 2" to M42 0.75 Adapter. The inside of the adapter is fully threaded to minimize reflections. also had M48 threaded for filter. At the end of the adapter is threaded to accept standard 2" filters.