D800 Firmware Update Focus Improvement!

Started Apr 2, 2013 | Discussions thread
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Re: D800 Firmware Update Focus Improvement!
In reply to Shotcents, Apr 4, 2013

You guys should stop smoking. I think I have one of the best database for AF Fine Tune for my lenses and my D800. I have measured the optimal fine tune back and forth for different kind of lights and the different AF sensors. I have upgraded the firmware tonight and checked again the optimal AF Fine Tune I've measured before. *This new firmware does not change anything* as far as the precision of the AF on static subject is concerned. Anyway, the precision is way enough for me.

There is no way any firmware update is going to automatically measure the position of your secondary mirror, and the alignment of the AF module.

For autofocus tracking, I trust Nikon. But if your D800 AF precision on static subject improved overnight, I really think it is a placebo effect.

PS: Here is my database, just to show you that I've measured a lot of things (x/y/z is far left AF/ center AF/ far right AF). Everything has been done at 30x the focal length.

105mm f2.8

Cold light: -10 / -10 / -10

Warm light: -15 / -10 / -17

Used in D800: -13

35mm f1.4

Cold light: -3 / +2 / -3

Warm light: +5 / +10 / +5

Used in D800: +3

85mm f1.8

Cold light: +7 / +2 / +5

Warm light: +2 / +10 / +2

Used in D800: +6

70-200mm f4 @200mm

Cold light: 0 / +6 / 0

Warm light: -5 / 0 / -5

70-200mm f4 @70mm

Cold light: +10 / +8 / +10

Warm light: +8 / +8 / +8

Used in D800: +3

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