EXCERPT page containing first few paragraphs. 2020-07-03 10:14:30
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Distortion reaches about 0.9% into the extreme corners, accelerating rapidly from frame edges to frame corners.
The shape is pincushion distortion, generally not so pleasant to the eye, but not likely to be an issue for many subjects due to it being primarly an edge-to-corner area (out of any typical portrait area of significant). However, it will be of concern for straight-line horizons, man-made structures, etc.
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