DotTune: Video Tutorial for AF tuning without photographs

Started Feb 18, 2013 | Discussions thread
Robin Casady Forum Pro • Posts: 12,898
Re: Problem: Focus changes during procedure

Horshack wrote:

Kaj E wrote:

I tired the procedure, but could not get it to work. Results were all over the place.

It turned out that the problem is that the focus point switches as soon as I switch from Live view. I focus with live view switch to normal view and then back to live view without doing any refocusing in between, and find that the focus in live view is not where I placed it. I tried in silent mode because I thought that the mirror slap may have changed the focus (activated the AF-On). But silent mode did not help.

Hmm, I've never seen this before. You're saying you focused in LV, dropped out of LV, went back into LV and the focus was different, without touching any buttons or the focal ring while you were outside of LV? If so, how much did the focus actually change?

I think he is saying that the PDAF focus point is not where the CDAF focus point was.

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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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