06-20-2013, 02:18 PM
The charts show the MTFs on the focus field (which is the industry standard).
The field curvature of the 17/1.8 is not extreme in any case.
The test procedure for the centering is in the lens section (it's a stick thread at the top of the list).
The field curvature of the 17/1.8 is not extreme in any case.
The test procedure for the centering is in the lens section (it's a stick thread at the top of the list).