DotTune: Video Tutorial for AF tuning without photographs

Started Feb 18, 2013 | Discussions thread
Kaj E
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Re: Why the middle of the range?
In reply to Horshack, Feb 21, 2013

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

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