I'd go with center-point with AF-Point Expansion (in case you have a bit of trouble getting the center point on the skier). Use a very fast shutter speed (Tv mode, 1/2000 or faster).


You may also want to change the defaults on some of the custom functions that pertain to AI-Servo tracking, e.g.


For solo skiers:

  • C.FnIII-1 set to slow
  • C.FnIII-2 set to 0 {AF Priority/Tracking Priority}
  • C.FnIII-3 set to 1 {Continuous AF Tracking Priority}




The idea behind the above settings is that once you're locked onto the skier, the AI-Servo system will try to keep the subject in focus, even if they pass behind a tree, etc.


For groups of skiers where you want to shoot whoever is in the lead:



  • C.FnIII-1 set to fast
  • C.FnIII-2 set to 0 {AF Priority/Tracking Priority}
  • C.FnIII-3 set to 1 {Continuous AF Tracking Priority}

<div>Hope that helps! Good luck...</div>