So I would like to start off by saying, I have never done any motorsport photography, however I entered a contest for next weekend, there will be a trackday locally and I am entered in the event as well so I will be driving and taking photos when I am not driving. I currently have a Canon 50D, 28-135is with a hood, 50mm 1.8, and a 75-300(unfathomably slow AF). I am wondering, do you think I will need a different lens for this to win the contest ( I know its not all the gear obviously, but will it help?) I was thinking about renting a 70-200 f4L, its about 40$ for 3 days on this website http://www.borrowlenses.com/
Maybe there is a different lens that will suit the motorsport photography needs better? I dont want to go overboard but I feel like I have a good eye and could get a good shot(only takes one to win the competition). I also have a dolica carbon tripod with ball head(not sure if this helps?) I will have on track access to take photos so what do you think will suit me best or will my current setup do? I could also ask my dads friend to borrow his 24-105 f4L(but there is no guarantee on that one.. but I can always rent whatever lens will suit the application best)
also any techniques or settings that will help me get the best shots and what I can do to practice ( I was planning on going out on the street and trying to get some shots of cars rolling by, but they are limited to about 25mph and I will see much greater speeds on track)










