Follow Focus Gear For LOMO (CKBK) FAST Lenses
This gear fits LOMO fast lenses.
But measure your lenses before purchase to make sure that size is correct (variations are possible).
Inner diameter - 82.5 mm;
Outer diameter - 97.6 mm;
Thickness - 4 mm.
Mod - 0.8 mm (pitch 32).
Holes are made on 86mm diameter with 90/120 degrees spacing.