EXCERPT page containing first few paragraphs. 2022-01-23 00:51:06
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This page shows optical distortion at 28mm, and its correction.
Correction was using the Photoshop lens profile during raw conversion. Sony ARW raw is never corrected for distortion by the camera (JPEG is however, if the camera is set to do so).
Example @ 28mm
Moderate pincushion distortion (bowing in) is very noticeable on a straight-line subject like this. The same would apply to a flat horizon.
Correcting pincushion distortion crops off a significant amount of the subject at opposite sides. Composing slightly wider is thus advised.
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