Just wondering what some of you guys are using at Indy for lenses. I won't have "credentials" so I'll be shooting from spectator areas. I was looking at the Canon 100-400 f/4.5-5.6L IS but is that too slow? Its a cheap rate to rent for the weekend to shoot some bikes but if its going to be too slow, I might bump up to something nicer. I have a 70-300 Sigma but the quality is not the best and its pretty soft.
I guess I'm just looking for suggestions or maybe samples of what I should be looking for in a lens for Indy.
Thanks in advance!


