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AF Fine Tuning; How Much per Scale Unit?

Bart B

Loveland, CO, US
122 posts

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Bart B Registered since 06th Mar 2007
Fri 16-Jul-10 10:37 PM

In learning about my D700, its autofocus fine tuning adjustment seems a godsend for lens-body combinations that ain't quite exactly match to the AF sensor/process.

But nowhere can I find anything about how much each unit on the fine tune scale that goes from -20 to +20. Does anybody know what each unit's worth: millimeters, centimeters, inches, feet, yards, furlongs......whatever.

I ask because if I can learn what the focus error is in some unit of measure, I won't have to do a lot of trial-&-error shots to find a starting place. Found a web site with a pretty good focus chart to download which I've used and it's pretty good:

http://regex.info/blog/photo-tech/focus-chart

Thanks in advance,

Bart


DX DSLR: D40
DX Lenses: Nikkor 18-55, 18-70, 55-200
FX DSLR: D700
FSLR: FG, N80, F100
FX Lenses: Nikkor 18-35, 24-85, 28-80, 28-200, 35-105, two 50's, 70-300; Series E 28, 100 & 135.\

USN, Retired
Hewlett-Packard, Retired

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