Baader 2a/M44i Thread reducing ring

Converts any 2" (SC) internal thread into an M44 x 1 internal thread - without extending the optical length; Manufactured as an adapter to adapt the Hyperion Universal Zoom Mark IV to as many spotting scopes as possible; Suitable for adaptation to Leica spotting scopes with male M44 x 1 connection thread. Also suitable for all M44x1 threads according to the old Zeiss (Jena) standard; Adapter with continuous 2" male and M44 x 1 female thread as well as two front holes