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Inconsistent Focus with Canon RF 50mm f/1.8 STM
The Canon EOS R5 has erratic results with autofocus on the Canon RF 50mm f/1.8 STM, and likely the same problem with the Canon RF 35mm f/1.8 STM. Perhaps with other lenses as well, because I have enough unexplained backfocus results that I have no other good explanation.
I first observed the problem during initial tests along Alpine Creek—the camera would focus well behind the intended subject, even for a solid object with ambiguity as to the subject.
Issue
The camera focuses correctly on the first attempt, but initiating autofocus again (shutter AF or AF-ON) delivers a backfocused image that leaves the subject visibly blurred.
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