D800 focus with 1.4 prime lenses is very variable and inaccurate

Started Jan 20, 2013 | Discussions thread
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Re: I'm not surprised.
In reply to michaeladawson, Jan 21, 2013

michaeladawson wrote:

So whether you are shooting at f/1.4 or f/8 the lens is always open at f/1.4 during focus acquisition and the AF system is operating at f/2.8.

Mike: Maybe this is a dumb question. What does this mean, the AF system is operating at f/2.8 even when the lens is open at f/1.4? Thanks.

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