>performance of lenses on the D800 is very different to how >they performed on other bodies. I would not use the 24-120 >lens on this body.
Perhaps the old 24-120 versions are soft on the D800. Quite a high percentage of the old VR versions, in particular, were soft on every Nikon body. Howver, the newer 24-120 f/4 VRII is a superb choice for the D800. It's a great lens.