I would love to get a fast telephoto lens as well, only problem is they are big $$. The night shots I took at Petit Le Mans were taken with an ISO of 25.6k. I didn't want to go that high but it was the only way to get something decent. Anything lower and all i got was blurry shots. If anyone sees a 200 or 300mm lens for a nikon at a good price, let me know