DotTune: Video Tutorial for AF tuning without photographs

Started Feb 18, 2013 | Discussions thread
Robin Casady Forum Pro • Posts: 12,898
Re: An additional comment

michaeladawson wrote:

The dot range for a manual focus lens is way too wide to be able to get anything sharp on a repeatable basis. You can look at the focus scale on the lens barrel at each end of the dot range. It's way too wide. You can take a picture at each end of the dot range as well. You will get blurry photos. The dot range is almost useless for manual focusing if you like sharp photos.

It would be much better if the dot range for manual focus lenses was kept small. It would be far quicker and easier to focus with a narrow dot range than it would be with a wide range where you have to go back and forth many times to be confident that you are in the middle of the dot range.

What would be really nice would be a scale similar to the exposure scale so you can see the degree that it is out-of-focus, not just the direction. That way the center point could have a very narrow range, but you would know how close you are when not on center.

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Robin Casady
"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
— Bertrand Russell

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