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Sony RX1R: Unstable Manual Focus

In my review of the Sony RX1R I previously detailed the ill-conceived manual focus mode of the Sony RX1/R, which I consider one of the weakest and most frustrating areas of the camera.

But there is another problem. Examining my various aperture series and lens rendering series, I found that the RX1R image reproduction size changes across apertures in MF mode. This can only happen if the camera is altering the focus between apertures when the camer is set to MF mode. In short, it’s a bug. It tends to almost always happen between f/16 and f/22, but happens at other apertures too.

This type of issue is disturbing when setting up a shot carefully for optimal focus, but so far I have not yet established a case where I have seen an actual loss of image sharpness as with the Fujifilm X-E1 focus creep issue.

Sony RX1R with EVF and Really Right Stuff grip
(my preferred shooting configuration)

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