Well, there are lab tests and there is real life !
Nikon has state on release the D800 that to get the best of the new sensor you need to use very high speed/tripod and the very best lenses !
All of my lenses (I hold some of the best like the Nikon 200/2 VR) show a decline in contrast, but are fine on the D800.
The only problem is with the ultra wide (weitwinkel) - Nikon state that the best lens for the D800 is the 14-24 - I don't hold it any more, but I trust Alex M. when he says that it's not that good underwater, probably because of dome port issues ?
I sold my 14-24 for the 16-35, when I was using the D700 - it was great above water !!!
Now, I've sold all my cameras for the D800 - it's not working !!!! the center is very sharp, but the edges are completely smudge, even when I stop down to F/13 and use 60 mm' ext' rings. I could blame only my Sea&sea 240 dome port, but, I get almost the same results, shooting out of the water !!!
I've tried 2 days ago, out of the water, the 17-35 and it's sharp in the center, like the 16-35 and it's a bit better on the sides then the 16-35 !!!
I'm afraid, there is not, yet, a really good ultra wide (weitwinkel) zoom lens for the D800 and, for now, it will be the best using prime lenses.
Edited by udi62, 27 February 2013 - 01:52 AM.