>Did you move your camera, when skier crossed viewfinder, or >keep it still? Please respond. David
As is typical, I was tracking the skier through the viewfinder, aiming to keep the selected focus point on the skier - however with 3D tracking the focus point would jump around due to the tree being a similar colour. So I would correct it as quick as I could. Luckily the skier was at some distance as were the trees so it had little overall effect on focus.
Tomorrow I will be out with another group and use 9 pt Dynamic and compare the performance. Sounds like weather conditions may be challenging but I'll get the camera out at some point I'm sure