Hello . . . While I have photographed plenty of youth and high school football from the sidelines, I may have the chance to spend a Sunday afternoon on the sidelines at an NFL game year. I am primarily a wedding/portrait photographer these day and I shoot with a crop system of Nikon D7000 and D7100 bodies. I have an 80-200f2.8 AFS lens and an assortment of fast primes and zooms shorter than that. I also have an old manual focus 300f2.8. So, if I get this chance, I would like to shoot with the bodies that I'm familiar with and I'm thinking about renting another long lens. For those who shoot college and/or pro ball, should I rent a 300, 400 or 500mm lens? All are available from a local shop that I have done plenty of business with. I know that the game is going to be bigger and faster than anything I have worked before . . .