I was hoping you could suggest a good telephoto/telephoto zoom lens. I'm really not sure if I will need it. I currently have a 28-105mm lens and a EF 17-40 f/4L USM in the mail. I plan on using it for different sports. I really want to get some pictures this year for track when I'm not throwing. Any help/advice is appreciated. Camera: Canon EOS Elan 7ne Thanks.