– System M68/1 – intermediate ring (tuning ring) 1mm thick, corresponds to
approx. 1 turn of the thread
– Very thin intermediate ring for fine tuning in the M68
eyepiece projection
– Insert ring with M68 diameter without thread
– Fits between any M68 screw connection.
– Prevents an M68 screw clamp from getting stuck
CHF 9.90
