I have no experience with a lens as large as the 100-300. I want to purchase it prior to the upcoming F1 race in Austin this November and am wondering if it will be sufficient to cover my zoom-ing needs. Does anyone have picture examples of the 100-300 lens? What I'd like to see is of someone standing in the exact same place for each picture but with a lens maybe like a 50mm equivalent lens and then how far the 100-300 zoom would take it in. If someone has images or wouldn't mind taking a couple quick ones that would be greatly appreciated! Thanks.