I primarily take photos of the local bike races here in Northern California, and this lens is perfect for the sport. The focal range is just right, and is always so sharp. It works especially great on the straightaways, where I can use the f/2.8 to its best. I also use it for panning, where it equally works just as well. Lately I was in New York for my friend's very first IronMan (Lake Placid), and got some pretty great shots of him swimming.