Hi - Has anyone used both of these lenses??? I have the Sigma 500mm F4.5 (Whch needs a service).
I have 200-400 Lust - LOL. Just wondering if the 200-400 is a huge improvement over the Sigma?
(The VR of the 200-400 is attractive for handheld BIF)
Size wise is the 200-400 biger or smaller than the Nikon 200-400.
All opinions valued.
thanks

