EXCERPT page containing first few paragraphs. 2019-09-18 01:04:25
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A tonal curve was applied here for contrast.
Faint traces of lateral chromatic aberration are visible at left (easily correctable), something of a surprise. And at f/5.6, sharpness is disappointing away from the central 3/4 of the frame.
Examination of the lower left and lower right shows blur on the entire left side, and better sharpness on the right, so this appears to be a lens skew error, and perhaps not inherent to the lens design.
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