I'm hoping to get some ideas from some of the experienced motorsports shooters on here. I'm using a 450D w/a 100-400IS and am getting a very poor ratio of sharp shots at 400mm at the track. Looking for pointers or ideas about how to increase my sharpness at 400mm...especially for far away shots. I'm pretty sure my 100-400 is good b/c I get sharp shots when I shoot something still or something close at 400... and occasionally when I shoot something moving that's far away. I'll post a couple of examples and would appreciate any feedback.
These images were selected purely to show softness at 400mm so pls ignore composition, angle etc. They're 100% crops of the center section of the image, no other pp. Is my issue a depth of field problem? Lens calibration issue? Panning technique? Or do I just need to be closer to get sharp shots? Help!
Exif data should be intact but shots were taken at 370mm f8 1/400th and 400mm f8 1/320th, both with center point focus. Can't remember if IS was mode 1 or 2 on these particular shots but I believe 2.
Thanks for any help!