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Leica 28mm f/2 APO-Summicron-SL ASPH

Distortion and Distortion Correction for Leica 28/2 APO-Summicron-SL ASPH

Leica flags distortion correction and chromatic aberration correction as mandatory in the EXIF info, which means that the MTF charts are pure fantasy, impossible to realize once distortion correction is applied. ACR enforces these corrections. There is no distortion graph in the datasheet and the datasheet make no mention that correcting distortion (required!) will significantly degrade MTF over at least half of the frame. Leica can design a lens however they want, but they ought to at least be honest in their marketing materials.

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