EXCERPT page containing first few paragraphs. 2022-08-17 22:20:31
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A lens can be made small and light and offer very good performance, but something has to give, and typically distortion is allowed to grow.
This “distortion compromise” is indeed the case with the Sony 28mm f/2, whose distortion is pronounced. Correcting it will be all but mandatory for many shooting situations.
The distortion correction is not a freebie; there is a loss of image quality in areas that must have the pixels stretched apart for the correction. In this sense, the excessive distortion of the Sony 28mm f/2 is a sharpness issue.
Fine details are degraded with a loss of micro contrast when distortion correction is applied. The results looks just as they might if one upsampled by 25% or so (in the most affected areas, much less so in less affected areas). One is just never going to achieve top-grade results in the corners of the Sony 28mm f/2 when distortion correction is applied, and this issue will be much worse on a 50+ megapixel sensor.
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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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