Hey masses, I'm an avid football fan, and becoming an avid photographer. While watching football this weekend (Go Seahawks!) I saw all these sideline photographers with lenses that ventured on competeing with the CN Tower based on length! They are HUGE! What I'm wondering about is where does a guy get one of those lenses and how much do one of those puppies cost? It would be awesome being a sideline photographer. Anyone here ever done that? What kind of lenses are they using. Thanks.