Nifty fifty STM - focus issues, or human error?
Re: Nifty fifty STM - focus issues, or human error?
I've just been testing my new 50 STM and am struggling with the same issues.
I tend to think it is not down to mechanical play since switching to live view nails focus every time, and using old-fashioned SLR AF nails focus on average a bit less than every other time, depending on light level (based on preliminary tests). Either that or the way the algorithm works excites the mechanical play and leads to the way focus doesn't come to rest at the same point each time you half press.
My tests were done at maximum aperture but I didn't notice an improvement when I tried a few with the lens stopped down after reading some comments here (other than a deepening of the zone of focus which somewhat masked the problem in some instances).
Canon EOS 20D
Canon EOS 50D
Konica Minolta Maxxum 7D
Sony SLT-A37
Canon EOS 6D
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