D800 focus with 1.4 prime lenses is very variable and inaccurate

Started Jan 20, 2013 | Discussions thread
primeshooter OP Veteran Member • Posts: 4,016
Re: I'm not surprised.

rtf wrote:

Hi. Maybe my views with regard to what I would personally expect from my camera equipment, are outdated, but what I see is a 36 million pixel sensor, f1.4 - with very limited depth of field, camera hand held, and a subject that is not 100% still. Your lens will not perform at it's best at f1.4 either. Why did you need to shoot at f1.4? You would still have isolated the background at f2, but gave yourself a fighting chance with a little bit more depth of field. I have a D800/D700/D7000 and I would not expect any of them to be at their best at f1.4. It's a big ask.



Sorry I don't rate your questions. Lv contrast af works fine, at 1.4 so why not pdaf? The d700 had no trouble. I shot at f/1.4 because I wanted to. Also a slight front focused f/2 would still not have looked as nice as f/2 properly focused. If you can understand that live view autofocusing works for this type of shot, and usually takes at least 3 seconds with greater ability for movement of the subject and photographer then your argument is invalid Of why this isn't working with PDAf autofocus.

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