If you shoot motorsports (cars and cycles) with your 7D how have you set the custom functions for auto focus/drive (C.FN III)? I am interested in how you have set functions 1, 2, 3, 4 and 7 and if you think you've improved your results based on any of the custom function settings. Have you made any other settings changes that improved the quality of your panning shots?
I have been shooting motorsports for several years with a 40D and recently purchased a 7D. Most of the time I use the 100-400 L lens.
Thanks for your help.