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I own Michael Tape's LensAlign software, I own Focal (some of the worst software I have seen developed and I had over 30+ years in the software industry) and I have tried DotTune.
AF is a wonderful thing but its a mechanical thing and no matter what its not 100% repeatable. I have software reports from the products above and experience that back this up. No matter how much I tuned, I still found times that I questioned the settings I was supposed to follow. AF is like a grenade or nuclear bomb, close but not precise.
I decided last year to AF fine tune at distances I work at and shoot at. IF NEEDED. So I test my lenses using a mannequin dummy's head (eyes, nose and mouth) in the studio and a brick wall at 90, 45 and 15 degrees. Thats it. I adjust based on what I'm focusing on and where I want the front and back focus to be. Simple and it works for me better than anything I have bought or tried. I've found my lenses do not need all that much help with AF if any. I tested my D4s and D810 last week with 6 lenses and a few of them really "popped" with slight adjustment. Otherwise they were fine. Yes, I tested a Sigma 35 1.4 Art which I pretty much zero'ed out with my D800 and the dock. It was one that was fine really but on a hunch I went ahead and worked up to +7 and man, the images really popped there so I left it. On the other camera, it was fine with no adjustment. I try all the lenses with values up and down the scale but most time find little need to adjust now.
I'd suggest you shoot, observe and not get too caught up in AF fine tune. Use it like anything else, when you need it and don't just adjust for the sake of adjusting or because you can.
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