Quote Originally Posted by NFLD Stephen View Post
How did you find FoCal? I gave it a try ~1year ago when I first got my 7d and found it much simpler than trying to afma the old fashioned way...

I'm actually going to set up again and redo the calibration on my lenses. I'm wondering if the microadjustment could have changed (maybe bumping the camera/lens around could change it a bit?). Does anyone regularly re-check afma or is it just not necessary (unless obvious problems are noted)?

Stephen
I really like the software so far. There were about 3 or 4 times the tests stopped because of an error. Something along the lines of "FoCal could not initiate Mirror Lockup" (even though the auto calibration test was almost finished). The bad part about it is that the program throws out all data from a test if it doesn't fully complete, so you can't even see the data it's already accumulated.

All I had to do was rerun the tests after the errors, though. I'm not sure if the error is common or if the fact that I'm running MagicLantern on my 5D Mark II had anything to do with it.

Otherwise, I thought the overall process was significantly faster, better, and less frustrating than having to do the process manually. I like the charts that are produced.

There were one or two instances where I thought the AFMA suggested value was 1 number off of what I thought the optimal value should be based on the test results. I think the program favors values based on the peak of the bell curve that it calculates using all the data points. If one side of the AFMA tested values tests significantly worse than the other side, then I feel the program over compensates by choosing a value closer to its calculated bell curve that may indeed be skewed slightly because of unbalanced poor values on each end.

That said, I only chose a number 1 off from where it suggested based on the charted data. I feel like it does a great job on the whole.