Eventually, after I learn to use this camera a bit better, I'd like to do a lot of wildlife photography. I'm curious about what kind of lenses I should consider for that. I know I'll need a good telephoto, of some sort, but there seems to be a couple thousand varieties out there. So, what would you say is the best lens for wildlife for $500 or less? What about for $1000 or less? I don't mind if it's used, new, or reconditioned. And, on the same subject, how far out can these lenses reach? Let's say a 300mm lense, how far away can something be and still get a nice large shot of it? A duck or eagle, for example? It's for a Nikon D80, by the way.