Hey all, I just bought the Canon Rebel XT 350D. I have the 18-55mm lens it came with, and another 75-300 that my friend who works at BB threw in to make a package. I was wondering about other lenses, as I'm pretty new to cameras, this is my 2nd digi. What exactly are the benefits of a telephoto, the wide angle, ect. I looked on the canon page, but I'm camera stupid, could someone put it in simple terms for me?