This is an EOS-noob question. I don't know the camera yet and the sports event is on Saturday afternoon. I'll bring the wide shot of the start home with another camera. The runners strt at the regular mark on a soccer field surrounding track. - I am planning to dash across the field and get them coming out of the first corner or down the 2nd straight leg of the track. - They will be about 100 people, I'd like to try to capture everybody, So RAW as susual doesn't sound like an option buffer wise. I suppose I shall set the camera to noisy continous shooting, at least 1/500 sec f8 auto ISO, IS on. - I have a 70-200mm as my only lens. What to do about the JPEGs? - Keep them neutral? Or what would you recommend? What to do about the AF? Set it to what exactly? - The multitude of options is confusing to me. Shall I try to get used to backbutton focusing or not? - If "yes", how to practise? - I stumbled across some folks claiming it would be a thing of the past. - I have no own opinion since the other cameras I used seem so sluggish that I couldn't see much benefit of it. Does it make a lot of sense to switch all image optimisation processing in camera off because it's processor is underpowered and would slow things down? Sorry to bugger you all. I'm aware that the 5D isn't the ideal camera for that job, but I couldn't afford an 1D and it is really just that one sports event every year, that I have to cover with an SLR. My regular interests are concerts, events, people where it should shine(!), even with just me trying to select focus points by hand.