EXCERPT page containing first few paragraphs. 2022-01-23 09:43:57
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This scene shows optical distortion at 16mm, and its corrected version.
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 @ 16mm
Images have been rotated to precise level (camera leveling is only good to 1° or so), and then cropped slightly.
The uncorrected image has quite strong barrel distortion in central zones, moderating at the far edges/corners to very low distortion (reduce relative distortion). There is no apparent wave-type distortion here at 16mm, as is typical with many wide angle designs.
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