Originally Posted by
hoffy
Are you serious? I don't know if you understand (I'm sure you do), but Motor sports is inherently dangerous. Having inexperienced people on the fast side of the fence is just an accident waiting to happen (With no offense to the OP, as I don't know his level of general motorsports experience).
At least you got something right
To the OP, get out there with your 70-300 and shoot, shoot, shoot. If you are doing circuit racing, you are in reality only a few metres away from the pros on the spectators side of the fence. If you really want to have some nice clear shots, consider going to events that are of a lower level (state and club championship events are perfect) and practice a lot.