Just picked up a 21mm f4.5 biogon and it has a weird problem. The cam that interfaces with the focusing mechanism is clocked wrong. I could see if it was 180 deg out that someone installed the cam turned around but it's out like 20 degrees counter clockwise from where it should be. I figured this out looking at a half dozen other contax mount lenses after if was acting weird trying to mount it to the camera. Yes I know to set the body to infinity and the lens to infinity before trying to mount it 
My question, is this an easy fix or should I send it back. I got it for a decent price and it's a super clean lens optically and appearance wise. I could easily spend as much and end up with one with haze or other issues for the same price.
My question, is this an easy fix or should I send it back. I got it for a decent price and it's a super clean lens optically and appearance wise. I could easily spend as much and end up with one with haze or other issues for the same price.
