This is one reason why you don't see professional photographers using entry-level 35mm cameras for their assignments. Such cameras just don't measure up to their requirements. Me? I was using that Grand Prix event to test three different cameras' AF performances, the EOS 300, EOS-3 and the EOS-1N RS. Loris Capirossi in action (at 70mm) Olivier Jacques in action (at 70mm) Anthony West in action (at 100mm)   The EOS-3 made a world of difference in tracking fast-moving subjects - the photos of 250cc riders (above) of Loris Capirossi, Olivier Jacques and Anthony West were shot with the EF 70-200mm f/2.8L USM zoom lens set at the 70mm and 100mm focal lengths. All three photos were achieved with minimum focus tracking distances - about 20 meters from the moment I aimed at the approaching riders and clicked the shutter. The distance between the riders and me (the exact point where the images were recorded) in this particular chicane was also 20 meters away. The reason for the short distance of focus tracking time was due to a track marshal's post that was located not far from where I was shooting from, preventing me from getting a longer tracking time for the EOS-3. Nevertheless, the camera performed its job perfectly. However, for most of the 500cc session, I switched to the EOS-1N RS with a 300mm lens and moved up to a higher area, overlooking the same chicane but without the marshal's post blocking my view. << Back to Main . 1 . 2 . 3 . 4 . 5 . 6 . 7 . 8 . 9 . 10 . 11 . 12 . 13 .