EXCERPT page containing first few paragraphs. 2019-09-22 18:57:25
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This series takes a critical look at the performance of the Sony 85mm f/1.4 GM. In particular, the specular highlights on the water reveal the color correction and point spread function characteristics of the 85/1.4 GM.
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Every aperture is different due to the fast-moving water but f/4.5 is particularly lively and full of motion and reflection. Contrast is very good at f/1.4, but improves considerably at f/2 and again at f/2.8.
Wide open, secondary chromatic aberrations are readily visible, namely violet halos on high contrast specular areas and substantial magenta/green blurs on out of focus areas—in terms of color correction this is not even in the same league as the Zeiss Otus 85mm f/1.4 APO-Planar. In outer zones, the point spread function trends to “bird”s wings” coma-like points, a smearing which is unlikely to work well for astrophotography.
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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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