Follow Focus Geared Rings for Konvas OCT-19 lenses

Geared ring for Konvas lenses. Unfortunately, different lenses have different diameter of original focusing ring, so it is necessary to adapt the geared rings to them. We made three different rings for now.

Three set screws are included.

Here is list of lenses we had to test the gears with. But it seems that there were no strict standards on the focusing ring diameters. So, please measure diameter of your lens' focusing ring before ordering.