Well I just ran my 50mm f/1.4 through Focal Pro about eight times tonight. EV was 11. When Focal worked (it kept erroring out saying it could no longer find the target and then it prevented me from closing any of the app's windows) I got results from +10 to +15. When I got the +15 it said the fitment quality was poor. I got +10 with a "good" fitment quality, +12 with excellent, and twice +13 with excellent fitment quality and confidence rating. I set the lens to +13.
I don't know whether it is the new version of Focal or just this particular lens, but every other lens I have was much easier to calibrate...with no errors when using the program. Of course, f/2.8 is the fastest aperture of all my other lens, so perhaps having a two-stop aperture difference makes a difference to focus reliability on the target?
Anyways, I have tomorrow to return the lens before the long weekend here. I'm wondering if I should and get a different copy of it, or just keep playing with this current one. When I first brought it home it front-focused something fierce before I calibrated it. Now it is pretty good with focusing. I'm just getting a little anxious with all this camera and lens micro adjustment talk.