I see a lot of people complain about the AF on the 7d for subject in motion. Is it erratic un-predticable or just motion in general?
I do a lot of skiing/snowboarding work with my 7D and 5d3 and have no issue on the AF with either through a 200 f/2 and 400 f/2.8 mk II. Most of the motion I am capturing is smooth and fluid which lends to the ease of capture. I assume that the complaints come from BIF or such?