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p.38 #7 · p.38 #7 · Dot-Tune: Autofocus Fine Tuning in under 5 minutes | |
Both the last post and this one are for the 70D. I don't know if Canon changed anything with the newer releases regarding this.
Note, though, that I said phase detect operation, as that's only part of the process the EOS 70D uses in live view AF, at least for still-image focusing. Part of the reason the 70D's Dual Pixel AF isn't as fast as the conventional separate-sensor approach is that the 70D only uses Dual Pixel technology to achieve rough, initial focus; it then switches to contrast-detect focusing to check focus accuracy and, if necessary, fine-tune focus.
http://www.imaging-resource.com/news/2014/02/27/canon-dual-pixel-cmos-af-autofocus-secrets-of-the-canon-70d-explained
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