Shun Cheung , Jun 09, 2012; 12:09 p.m.
I only have the 17-35mm/f2.8 AF-S. I have tried that on the D800. Corner sharpness is kind of weak at 17mm, and it does not improve when stopped down. If you can avoid the extreme wide end, it should work well on the D800. I have used that on the D3X as well with similar findings.
Likewise, it is well known that the 16-35mm/f4 AF-S VR is somewhat poor at 16mm, as distortion is quite serious. From 18mm and up, it seems to be much better.
IMO, 20mm is plenty wide for landscape photography on FX/35mm film. However, if you want to use 16mm or 17mm frequently, those lenses can be a problem.