BMCC6K
I recently bought a 6k FF, it hadn’t been updated to the most recent autofocus yet, so I was really curious to see how good it was/wasn’t. What I had heard was correct, face detection was kind of bad, but object detection was pretty good, for the most part. Then I did the update and it was night and day! Face lock was so good that even when the subject turned completely around it stayed locked onto their head. I was in a controlled environment and there were no other people in frame, but even still there was an immediate performance boost after the update.