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Autofocus fine tuning poll! Please share your experi...

johno

St. Louis, US
525 posts

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"RE: Autofocus fine tuning poll!Please share your experience with autofocus fine tuning by selecting the appropriate choice below."

johno Silver Member Nikonian since 23rd May 2006
Fri 19-Apr-13 05:50 AM

Thank you all

This is getting interesting.

Len, if I'm reading your post correctly, you have an amazing array of lenses. I thought I had too many with 10 of them.

Poll is updated.

After more testing, I have found a frustrating trend.

A coup,e of my lenses clearly benefit from fine tune at +10 or +15 at f1.4, but by the time they are at 2.8 or 3.2, the tune has the opposite effect, causing back focus.

So the tune is only good at wide apertures. This is nuts.

Meanwhile my 105 2.8 VR is dead on without any tune.

This lack of precision is a real concern with the D800 because it is so revealing.

No wonder Nikon published a technical manual on how to get sharp pictures before the camera was even released. The key they advise is focusing with magnified live view. Perhaps the reason they recommended that is the autofocus system of their camera and lenses is not reliably up to the task.

Anyway, my results so far:

85 1.4G..+15 .at f1.4-f2.2.... 0 after 2.8
24-70 +10 at all apertures
50 1.4 g .l.l+10 at 1.4-2.0 or so, 0 after 2.8







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This is a hot, active topic! Autofocus fine tuning poll! Please share your experi... [View all] , johno Silver Member , Thu 18-Apr-13 07:45 PM
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