How can A6000 beat PDAF, doenst make sense?

Started 9 months ago | Questions thread
Bart Hickman
Veteran MemberPosts: 7,231Gear list
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No mirror blackout
In reply to dpyy, 9 months ago

dpyy wrote:

How can A6000 beat PDAF? Can someone explain the technology behind this? It doesn't matter how many points of autofocus they put on the sensor it should still be significantly slower than dedicated sensors?

The dedicated sensor may well be able to determine a focus point quicker, but it has to cope with the mirror blackout.  If a subject is moving, the SLR must calculate where it thinks the subject will be when the picture gets taken perhaps 0.1s after the last AF measurement was made and then "catch up" once the mirror flips back up to try to reacquire the subject.  Predictive AF is usually only available on the higher-end DSLR's.

With the PDAF on the sensor, the camera can continue focusing with no interruptions.  No need (or much less need) for predictive AF.

It was only a matter of time before camera processors got fast enough to take advantage of the lack of mirror blackout.

Bart

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Sony Alpha NEX-6 Sony a6000 Pentax smc FA 50mm F1.4 Sony E 55-210mm F4.5-6.3 OSS Sony E 10-18mm F4 OSS +10 more
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