Originally Posted by grizzle6
Bio--
I posted this in answer to a similar question several weeks ago. It should help. And yes--those are next year's atua's he's on.
I've found the the Auto WB setting with my camera does an accurate job. I do carry a grey card with me if for some reason I want to set it manually. I find that no less than 1/1000 exposure will do for skiing. Many times, depending on how fast the skier is going, how you're shooting it, etc. it might need to be more. Being primarily a scenic photographer, I practically always shoot in my Av mode (Aperture priority) and then I'll get the most depth of field I can without going below 1/1000 sec. Obviously, the larger your aperture, the more margin for error you've got on your focus.
The #1 most important thing (at least for me) for action shooting is tack sharp focus, so whether you're shooting a one turn wonder, or just trying to follow your subject and shoot, I suggest pre-focusing on 1 or 2 turns. Let the skier ski a natural line, but tell them where you want them to go. They don't have to know which turns you're shooting. Many times it works better that way. If they're hitting an air, remember that, depending on which angle you're shooting it from, you likely will not have the skier in focus the entire air. Pick the spot that you think will be the climax of the air--whether it be takeoff, midway into the air, etc. If you can't focus on "mid-air", gauge the distance to it and pick an object at similar distance to focus on, or use your camera's focusing distance (located on your lens, sorry to be obvious) and guess the distance accordingly. With practice, you'll get pretty damn accurate.
On rare occasions I'll use my autofocus. Canon's AI Servo mode is fairly accurate, but I just don't trust it entirely. I know many do--I just need more practice.
Anyway--that's just my .02. I'm sure there are many other photogs on here that could provide valuable insight as well.