EXCERPT page containing first few paragraphs. 2021-06-16 23:19:07
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Barrel distortion = bowing-outwards of the image shape.
Pincushion distortion = bowing-inwards of the image shape.
Wave-type distortion = dominant barrel distortion reversing to pincushion distortion, typically well out to the the edges or corners.
Zoom lenses invariably show barrel distortion or wave-type distortion at the wide end along with pincushion distortion at the long end. The neutral point is typically somewhere in the middle of the zoom range, but it can be significantly skewed towards the wide end or long end, depending on lens design.
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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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