^^It has a nice range but I'm sure the IQ isn't all that great on the far end. That and the fact that it's a slow lens wouldn't help much for sports. If I'm going to have a long focal range like that I'd opt for the Canon 400mm f/2.8 L as it;s fast and produces amazing results. But I'd have to rent one because I sure as hell don't have $6000+ to blow on one freaking lens lol.
Here are some thoughts on that Sigma http://www.fredmiranda.com/reviews/showproduct.php?product=105&sort=7&cat=37&page=3
Review http://www.the-digital-picture.com/Reviews/Sigma-50-500mm-F-4-6.3-EX-DG-HSM-Lens-Review.aspx
Oh I know that faster is better. I just don't have the money to purchase a L series. Especially a prime. :shock: Anyway I'm looking for the best bang for my buck here. I'm wanting a lens that I can shoot wildlife with but can double as a sports lens (sunny day ). I've looked here at some of the pictures taken with this lens and I think it will do what I'm wanting it to do. If anyone can point me to a comparable lens, (price, range, quality, etc) please do so.
I'm still a beginner/novice. I have a lot to learn about composition, proper exposure, etc. Right now my equipment is rather limited.
My equipment list:
350D with kit lens, Tamron 28-75mm f/2.8 Xr Di.
Bag, strap, tripod.