ok i know i want the 70-200 for outdoor filming is it worth it to Pay twice as much for the f2.8 ??? or will the f4 be really good. is there that much light gathering difference ??? if there is than i know i will want the f2.8

let me know your thoughts

thanks!

Previously discussed at http://www.dvinfo.net/forum/canon-eos-7d-hd/427289-tele-lens-question.html

Please refer to that thread and post replies there... thanks in advance,