EXCERPT page containing first few paragraphs. 2022-01-23 00:35:04
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It is always unwise to put new gear into production use without verifying its reliability. That is particularly true for fast lenses with autofocus.
Right away with the Sony 85mm f/1.4 GM, I noticed a disturbing tendency for Sony A7R II autofocus to be off enough to seriously degrade results at f/1.4, enough to call it a “2 stop error” in some cases, meaning at least f/2.8 would be needed to obtain the quality that ought to have been captured wide open at f/1.4. Or put another way, an error that turns a 42 megapixel camera into a ~12 megapixel camera. Or something akin to that.
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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.
- Make better images by learning how to get the best results right away. For example, the best way to set up your Sony 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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