I am shooting a college indoor swim meet tomorrow and am loking for some pointers. I've shot plenty of basketball games before so I know all the high ISO, high shutter, fast lens, center AF, blah blah blah. What I don't know is the etiquette for swimming. I know fast and long is good for swimming; I have fast with a 85mm f/1.2 and 70-200mm f/2.8 and I have long with a 400mm f/5.6, but its not fast, all on a 1D II. Can I use flash indoors at the swim meet or do you think it would be frowned upon. Also, if flash is okay, has anyone ever tried a 400mm + on camera flash combo for indoor swimming? Does it work well, or should I save the weight and leave the 400 and flash at home? Thanks everyone.