Originally Posted by cho_888
wow! that must be at least a 600ml zoom! was it an SlR, meaning did it have a big lens that came off?
we took this at the grand prix and we had 3, 1gig cards and we only got a few good ones. Your mates camera must be a 1D nothing else can focus that quickly!
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Unfortunately just because you have a good camera doesn't mean you'll get good photos, and you don’t necessary need fast focus, for instance you can Pre Focus lock
A 300mm lens (effectively 480mm) fitted to a 10D, 300D or D70 is sufficient for track motorsport events. The longer lenses are aimed at Wildlife photographers who need to fill a shot with a tiny bird from 100 metres.