EXCERPT page containing first few paragraphs. 2024-04-18 01:11:42
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Distortion for Otus 85/1.4 APO-Planar
Distortion changes with focus distance.
At 1:30
At a reproduction ratio of 1:30, pincushion distortion into the extreme corners reaches 0.5% which is very low for an 85/90mm lens. For example, the Leica 90mm f/2 APO-Summicron shows notably higher pincushion distortion of ~0.85%, and it is a full stop slower in lens speed.
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