EXCERPT page containing first few paragraphs. 2021-11-26 15:51:15
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The claimed MTF at f/2.8 looks outstanding for this type of lens to frame edges, rolling off strongly to the corners, perhaps from field curvature.
Although the Sigma 45/2.8 becomes very sharp with stopping down, field shots suggest much lower MTF at f/2.8 than claimed—see Orange Flower.
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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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- Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.
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