My motorsport bag.
8mm Fisheye
17-40 f/4L
70-200 f/2.8L IS
300 f/2.8L
400 f/5.6L
I use all. A lot. The real thing with motorsports is getting shots the other people are not getting and having the gear to get those shots. The 70-200 is the single most important motorsport lens in my opinion. I rarely take it off one of my 7Ds. It is an awesome people lens at f/2.8 to blow out the background.
You will however need longer glass and I prefer the primes. They simply produce better results that are consistently sharper. They also offer a creamery bokeh and the telephoto compression looks nice when shooting trackside. The nice side product is a photo taken with a 300mm f/2.8 in the paddock/pits returns an awesome photo! Great for candid shots. It also gives you the ability to add a 1/4X and be shooting a 420 f/4 while maintaing sharpness. If you really want to push it can get a 600 f/5.6 out of it but the IQ does suffer there.
Carry the 400/5.6 - The best bang for the buck motorsports lens. It's light. It is SUPER sharp. For the price paid on the used market of 1,000 dollars you get a lot of reach and can hand hold it. The results are spectacular!
The wide angle... well you experiment and shoot locations that no one else is shooting. The Fisheye can be used for the fun/interesting look at a racetrack.
Some samples to show you what you would be looking at using some of these lenses.
70-200:

Burtin Goldcrest Porsche 911 GT3 Cup Indianapolis Motor Speedway IMS NASCAR Grand Am Friday 01
17-40:

Multimatic Motorsports Aston Martin Vantage V8 Indianapolis Motor Speedway IMS NASCAR Grand Am Friday 01
300 on track:

Brumos Porsche 911 GT3 Cup Indianapolis Motor Speedway IMS NASCAR Grand Am Friday 01
300 for people:

BimmerWorld BMW 328i Indianapolis Motor Speedway IMS NASCAR Grand Am Friday 01
Just saw these, these are AMAZING !!!!











