DotTune: Video Tutorial for AF tuning without photographs

Started Feb 18, 2013 | Discussions thread
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Horshack OP Veteran Member • Posts: 5,803
Re: DotTune: Video Tutorial for AF tuning without photographs

djsphynx wrote:

Pretty neat stuff, thanks for the information! I have just one question: does it matter which focus point is used, or should the test be repeated for a certain number of points then everything averaged out?

Thanks again

Rob

Typically the center point is used since camera bodies don't support per-AF point tune values but you can use the method on other AF points to see if there's a tune difference between AF points. Keep in mind that some lenses have strong field curvature and for those a tune delta is expected, like the 28G f/1.8.

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