Headline - DSLRs have imprecise focusing due to their mirrors

Started Apr 5, 2014 | Discussions thread
D Cox Forum Pro • Posts: 21,098
Re: Closed vs open loop focusing

stevo23 wrote:

I think speed is not the issue here. There is not much difference in lock speeds, all we have to do is look at IR tests. The problem arises when the subject is moving because the quick back and forth gets complicated there. Since the subject is in motion, the back and forth is confused by the moving goalpost so to speak, but for lock speeds it's not much slower, and in some cases it's faster. Speed is different than predictive tracking, we need to remember that. The only issue on sensor AF has is tracking, and that is experiencing big changes right now.

I've never experienced CDAF that was as fast as PDAF, so not much for me to relate.

The limit here is the speed of the processing chip in the camera, and the efficiency of its software algorithms.

As the manufacturers get faster chips, CDAF speed can and does improve. An example is the new Bionz chip now being used in the new Sony cameras.

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