As I mentioned in another thread, I'm trying to buy a lens as I'm getting into sports photography. I'm shooting with a Canon 20D, needing a pretty fast EF lens, can't afford Image Stabilization just yet, but wanting something in the 100-300 MM range. I'm seeing a lot of generic lens' like Tamron, Sigma, Vivitar, Quantaray, Tokina, etc.
Has anyone ever shot with one of those? Are any of them worth a crap? I don't want to spend $100 on something that I'm not going to like, so I've just been looking at Canon Brand name lenses. But if I could get something as good for less it would be worth it to a guy like me.