– System M68/0.3 – intermediate ring (tuning ring) 0.3mm thick, corresponds to
approx. 1/3 thread turn
– 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
