Great set, but this first shot is easily my favourite. Lighting looks lovely and the timing is spot on with the car getting some curb there.
So I only used the 70-200 for panning during my comparison day with the 55-250 at Touring Car Rewind. I tried to give the 70-200 more time as I have used the 55-250 a lot over the years so I am obviously very familiar with it but, despite my best efforts, I couldn't get as sharp a pan out of the 70-200.
I suspect it would be a different story in low light but, for the general conditions I am in the vast majority of the time, I am not convinced the 70-200 is going to be a massive benefit at the moment. I hear what you are saying about the pitlane/driver usage though and, as the 70-200 owner has been kind enough to let me use the lens for a couple of events (and as I really need to spend more time trying static shots and not fixating on moving cars!), I may try and use the 70-200 for that next time out.
First time out with my 100-400 as well. Felt odd having so much more range now, really looking forward to getting more practice with it.
Opel Vectra (1) (Robert Whelan) by
Steve White, on Flickr
Peugeot 306 GTi (72) (Carl Chambers) by
Steve White, on Flickr
I did wonder if sustaining panning with the 100-400 might be hard work after mainly using smaller lenses but, in some ways, I was finding the bigger lens made it easier to get a smoother track.
Favourite pans of the day all came from the trusty 55-250 though:
Vauxhall Vectra (5) (Jason Hughes) by
Steve White, on Flickr
Vauxhall Cavalier (67) (Tony Absolom) by
Steve White, on Flickr
Ford Escort RS1600i (84) (James Brick) by
Steve White, on Flickr