I have just purchased a T3i and have the kit lens as well as the 75-250mm lens. We are going to the Daytona 500 race and I was wondering what settings I should use to shoot the fast paced race. I would love to grab a nice shot of a speeding car as it goes by me when I am sitting in the stands. Do I need anything else such as an eye piece as I do wear glasses and really cannot see without them. I have focused the diopitic the best I can and it looks sharp, and I have taken some shots and they look good.