M12 Lens Focus Lock Ring for M12 and S Mount Cameras
M12 Lens Holder Focus Lock Nut Ring
This M12 lens focus lock ring can be use to retain focus. The lock nut is made out of anodized aluminum. This lock nut is better than using a set screw, however, we still recommend using a low out-gassing adhesive.
There are 60 units in stock in California.