Quote Originally Posted by E. von Hoegh View Post
Those inner biconcave elements have different radius curves on each side. How do you know they're in the right way?
Great question - I did not realise they were different. The inner lens do not have any pencil marks, so I will label them myself and take 2 photos to compare. Should these be at infinity or is closer up ok? Infinity photos are problematic at the moment, so I would prefer a stobe illuminated target.