Does Sensor Based Phase Detect/Contrast Detect Eliminate Back/Front Focusing?

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4thnebula
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Does Sensor Based Phase Detect/Contrast Detect Eliminate Back/Front Focusing?
4 months ago

I have often considered this point a major reason for purchasing a mirrorless camera with PDCF on the sensor (or at least some type of sensor based focusing system).  I frequently read reviews when the reviewer will comment on back focusing or front focusing issues found in a particular lens.  I am not an engineer so I can't evaluate this question clearly nor do I have the facilities to test.

I have found with my Canon 70D a small but consistent better focusing doing copy work when I use live view (i.e. sensor based PDCF af) rather than standard autofocusing.  It is small and in real life probably not a problem but is a concern to me for copy work where I am working with a 2D surface.

Rather than hassel with trying to work with the situation I expect the problem doesn't even come up when using sensor based af.  Am I correct?

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