DotTune: Video Tutorial for AF tuning without photographs

Started Feb 18, 2013 | Discussions thread
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Kaj E Veteran Member • Posts: 9,247
Re: Why the middle of the range?

Knowing that the sharp focus is reduced more rapidly from perfect focus in the direction toward the camera than away from it , why do you propose setting the  focus at the middle of the acceptable range and not for instance at 1/3 from the closer edge of the range? I would suspect that the green dot goes to blinking more abruptly at the closer focus side. Have not tried your method yet, this is just how I would expect things to behave.

Have you done any test to confirm that the middle of the range corresponds to the best Live view focus?.

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Kind regards
Kaj
http://www.pbase.com/kaj_e
WSSA member #13
It's about time we started to take photography seriously and treat it as a hobby.- Elliott Erwitt

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