I have been shooting HS Football games this season, and have been asked to shoot basketball in a couple of weeks. My current equipment is a Canon 50D, with a 100-400mm f3.5-5.6L lens and a 10-22mm 3.5-4.5 and a 24-105 f/4 L. From what I have read all these lenses are too slow for basketball; I should be shooting a 2.8 or faster. How should I best restructure my lens/body collection to get good basketball shots? Would I be better off purchasing a 70-200 f/2.8 or purchasing a 50mm f/1.8 or possibly a f/1.4 and staying close to the action? I would consider getting both (long & prime) lenses, but then, I assume I would need another camera body on top of that and now $$$ really becomes an issue. (I do own an old 20D, in need of a shutter replacement...perhaps I should get it fixed and then carry both.) I would like to keep the transistion as simple as possible. If I was shooting with one body, what lens would serve me best? Are there other lenses I should be considering? Are carrying two bodies and lenses necessary for basketball?