hey all, need some advice from sports photographers. i'm going to see boston play in toronto next sunday, and am taking my XSi and 100-400L lens, and am loaning my brother my 70-200f/4L &1.4TC for him to use on his XS. i'm wondering if you could tell me what shutter speeds and apatures work best for action shots? i am going to be sitting by first base, about 39 rows up, and dont know if the dome will be open or closed (depends on the weather), and its an afternoon game, so high sun. i have never shot sports before and would appreciate any and all advice that will help me out here.


thanks in advance


jim