as for lenses.. I'm going to go out on a limp and assume that the two lenses you posted about isn't going to cut it for bike/car race pics.

I'll be the fstop is only 5.6 at the 300mm end.

Honestly I've talked to my friend who takes a crap load of car pics ( www.sportscarimage.com ) and with his D100 he'll shoot about a GB or so in a full day at the track.

Unless the shots are setup before hand it's very difficult to get the right shot.

but that doesn't mean it can't be done, it does mean that the picture quality will suffer

just my 2 cents


for most autox events he uses a 70-200mm f 2.8 lens while for track days he uses 100-300mm f2.8 lens.