It was a wet/dry day of F1 practise in both sessions. Here are my favourite shots. The panning shots are shot with a Nikon D3x with a 28-300mm lens and the other shots are with a Nikon D4 and a 400mm.
First impressions of the Nikon D4 for sports is that the Auto Focus behaves differently to the D3s/D3. The AF tracking seems to be more sensitive to the initial focus point. If you get that wrong then the burst will be out. I’ll try to post a sequence showing this separately. In the mean time, you can see more practise day shots here: