Could someone give me a step by step on what I need, and method to
adjust russian lens to match leica back focus . How to use a
collimator, what part of the lens to ajust for jupiter 9 and 12. Also
leica 135mm hektor
adjust russian lens to match leica back focus . How to use a
collimator, what part of the lens to ajust for jupiter 9 and 12. Also
leica 135mm hektor