Shooting from the boat is real difficult ... but the keepers make it all worthwhile ... here are a couple shots from yesterday ... 5D Mk2, 100-400 f5.6L - f8.0 1/1600 ... AI Focus I find works the best to track focus on the tuber (is that a word??)
and another ... same sequence but a few frames later ...
and one of my son before we managed to flip him over sideways

Thanks for looking
cheers
Phil




