Messages

I have a question about repeatability.   I ran DotTune for my Sigma 20 Art 5 times, refocusing each time, and I got values of -6,+10,-4,-5 and -15.   Throwing out the high and the low, that makes for a AF tune of -5.   I did the same thing with the Canon 35 IS and the Canon 50 1.4 and had a much large range of values (mostly between -10 and +10).   Does this make sense?

I used MF, One Shot, wide open with exposure +2/3, in a bright room with a target 2m away.

I would expect repeatability to be within 5 units each time (or a max range of 10).

Am I missing something?   I Have the latest nightly build on my 6D, and I can't get Dot Tune to display on the menu.  I have tried different settings (M, A, S, B) and lenses (Sigma 20 Art, Canon 35 IS, Canon 50 1.4) with no luck.   I admit I haven't gone through every post, so if that is what I need to do, just tell me please.

Thank you!