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"PDAF wasn’t nearly as accurate as CDAF"
9 months ago
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There are a lot more cool findings, but the first one is what I have said all along.
1. Phase-detection autofocus (even using still targets and center-point only) wasn’t nearly as accurate as contrast detection.
a caveat for Canon...
a few newer lenses did focus as accurately as contrast detection on 5D Mark III cameras but not on 5D Mark II cameras.
http://www.lensrentals.com/blog/2012/08/autofocus-reality-part-3b-canon-cameras
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