My Great Camera Club / FLICKR mate RICHARD has all CANON gear and I have tried to get him to join this site but always says " Too Busy with uploading Press Photos" BUT he Loaned me a CANON L series 200mm f2.8 Prime lens to play with -- I set 'SPORTS MODE' on my EOS 1000D body that he gave me and tried Follow Focus BUT it was not PERFECT on all moving cars coming towards me . Also in 'SPORTS MODE' camera sets 'JPegs' not the usual RAW . Then I took some on 'AV' exposure mode and that was RAW OK and lens was SHARP here are a few snaps -- You will see the SOFT ONES of GREEN CAR and RUNNERS in Grey