Question for Nikon supertelephoto users
I'm looking to rent a lens this winter for a waterfowl trip (and hopefully purchase one in the next few years) and am trying to decide between the 500mm and 600mm f/4 Nikkor. I'll be shooting with a D700 and a D300 body, and I'm planning on bringing along a TC or two as well. I don't know that I've heard too much negative about either one, but I'm leaning towards the 500mm. It seems like it might be easier for someone not used to shooting a big lens to acquire the subject (birds in flight, dogs working) with the 500 mm. I do plan on renting them both at least once before I make a purchase. Any thoughts? Thanks.