I'm looking at ways to improve my keeper percentage while shooting sports, and one thing that I noticed in my last outing is that many of my shots with my new lens (a Sigma 70-200 on my D70) are OOF. Granted, the light was pretty bad, and I've yet to use the lens to shoot sports under sunlight due to some horrible weather. Since I got my D70, I've always shot in Dynamic AF mode, and of course use AF-C on the center point for sports. I vaguely remember reading about someone who had trouble shooting moving objects using Dynamic mode, so I'm thinking of trying out Single Area mode. Is it possible that while using Dynamic AF that the camera is getting "confused" when there are many moving people in the frame? The camera/lens combo works very well while shooting stationary objects in AF-S mode with the aperture wide open, but I'd like to improve my output with moving objects. Exposures were all around 200mm, 1/400", f/2.8, ISO 1250-1600, so I don't think it was a problem with handholding. Motion blur also doesn't seem likely, as the subjects are "fuzzy" rather than "streaky". This leads me to the conclusion that I'm not hitting focus quite right in the first place. Any general suggestions or tips? Thanks a lot.