I'm going to be shooting a lot of high school sports this fall, with at least four more football games coming my way.
My longest lens for my 20D is a Canon 70-200 2.8, with a teleextender, it's about 440mm, but as a f/4.
Which of the lenses in the title provide the best "bang for your buck?" Noting that affording a Canon 300 2.8 is up there in price. Anyone have experience with the other lenses?





