EXCERPT page containing first few paragraphs. 2019-10-21 01:51:37
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The Sony RX1R has a disturbing tendency to change the focus slightly; it has unstable lens focus. For example, when focus is set, then the switch is set to MF at the start of an aperture series: no change should occur in size or framing across the series.
This unsettling behavior appears to be a bug akin to the disturbing Fujifilm X-E1 focus creep problem. It tends to happen most often from f/16 to f/22.
The change in image reproduction ratio is visible in the example below; this could only occur if the camera disturbs the focus by electronic juvenile delinquency.
Observe the change in size from f/16 to f/22; this was observed repeatedly in field testing.
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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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