"The only downside to it in my opinion is that it takes 62mm filters"
Thankfully I already own all of the 62mm B+W filters that I need due to the 50-135mm.
I have read that the front of the lens turns when focused on this lens, is this true? That is one thing about the 50-135mm that I love. I prefer to not have to re-adjust my circular polarizer after focusing the lens. I will be using the lens on a Nikon F6, as well as an F5. I don't think that this lens will be too heavy for these cameras, but I am not sure, as I've never handled this lens. I have considered the new Nikon 70-200mm AF-S VR II lens, but that lens is double the weight, cost 10X as much, and has no DOF marks on it. I really hate carrying heavy camera packs. I use to own the 80-200mm f/2.8 AF-s, and left it in the truck more than using it, due to its large size and weight. So I think that the 80-200mm f/4 could be the ticket.
Jared