View Full Version : Cooke Anastigmat Series III Lens Issue

9-Nov-2018, 20:11
I bought a Cooke Anastigmat Series III 9 1/2" lens from local seller, but aperture adjustment ring is stuck between f11 and f16. I think the lubricant has to be replaced. Both front and rear optical elements can be removed, but I couldn't find a way to take off the aperture adjustment ring. Please help me. Thx