EXCERPT page containing first few paragraphs. 2022-01-25 12:33:06
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With close-range portrait examples, bear in mind even to f/4 or so, a small movement of the subject or photographer, or compositional reframing (either or both) alter the distance, and thus focus can be displaced (even if it is perfect to begin with using autofocus, which is often not the case). Moreover, the Sony A7R on spot autofocus usually fails to focus on the iris of the eye, choosing instead the eyelashes.
Peak lens sharpness should be judged only when appropriate, e.g., when the lens is clearly in perfect focus and/or where it actually is in focus. Being handheld, A7R shutter vibration cannot be ruled out, but handholding tends to minimize the issue by providing some additional damping via optimal handholding technique.
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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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