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EXCERPT page containing first few paragraphs. 2021-12-08 02:07:15

Sony A7R IV
Sony FE 50mm f/1.2 GM

Distortion and Distortion Correction for Sony FE 50mm f/1.2 GM

The Sony FE 50mm f/1.2 GM has significant pincushion distortion (pinching inwards). The amount is low enough that for most subject it can be ignored.

Toggle to compare uncorrected to corrected images.

Example:window and wall

The only significant performance downside to the 50/1.2 GM is its moderate pincushion distortion, which shows up here in the bowed-in rendition at top. Correcting it degrades micro contrast but that’s less of an issue here due to image sharpness falling off slightly (out of focus) on much of the frame.

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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

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  • Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.

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Variants Uncorrected,Corrected available in full article
f4.5 @ 1/50 sec handheld IBIS=on EFC shutter, ISO 100; 2021-06-07 18:37:37
Sony A7R IV + Sony FE 50mm f/1.2 GM
ENV: altitude 6500 ft / 1981 m, 70°F / 21°C
RAW: LACA corrected, vignetting corrected, pull 0.1 stops, +20 Whites, +10 Clarity, USM {8,50,0}

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