pretty darn good panning shots. i was doing some SCCA photos in my region while my car was down and i completely understand how hard it is to keep the car in focus. Judging by the background it appears you weren't working a terribly long shutter speed but they look pretty good. i am headed to the balitmore grand-prix to watch the ALMS and Indy race, cannot wait! VIR is out my back door but biggest race there is the Grand-Am Rolex.
Thank you. I was at 1/100 & 1/125 at f4 & 5.6. I was very crowded by a guy on my left swinging his lens about into my neck. I like to track the cars longer to gauge speed & use a slower shutter speed, but didn't have room. So I took the safe route, ha. Rolex & ALMS are my favorite races. I'll be back at Mid Ohio in Sept for the Rolex race. Hopefully I can get more of what I want. Take care & have fun at your race.