AF tunning what actually happens?????

Started Jan 24, 2014 | Discussions thread
AZ Steve
Regular MemberPosts: 170
Re: To understand better - or maybe worse
In reply to mironv, Jan 25, 2014

The aperture blades, to be sure, are wide open when PDAF occurs.  Marianne contends that the effective light cone used by the AF sensors is stopped down to an effective f/5.6.  It is a very, very different thing!

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