Originally posted by B Grace One comment on the Nikon zooms: The 70-200/2.8 has always been a 35mm or FX format lens.
Both professional testers and users complain about severe vignetting and poor corner sharpness on FX, probably the reason Nikon has finally decided to do an updated version. The fact is it was released (and probably designed) at a time when Nikon didn't have a single FX DSLR in their lineup, and when they probably weren't optimizing lenses for their film cameras anymore.
As for zooms, the killer lens in the Nikon lineup is the 14-24, no other manufacturer has anything that comes even close to its performance. Of course, filters are a bit of an issue with that one. But that's really its only flaw and it's not much of a biggie considering how polarizers perform at such a wide angle. That lens is the only thing I truly miss, having switched
from a D700 to the K-7. Sure, the D700 is a low light monster, especially paired with a 1.4 lens, but honestly due to my shooting preferences, I can't say I'll miss many shots by not having that.
I'm just curious as to why the OP has such a strong need for a full frame camera... Maybe he only shoots in extremely low light?
Thomas