Re: tokina 11-16mm on d800
there is no need to worry too much about this awesome Tokina on full frame. I have the same combo and always use the 16mm end on D800, and it just works perfectly. You need to stop down for landscape though, but the center sharpness is still fantastic wide open! Since this is the only possibility an ultrawide that can take filter on Nikon FX and works well in low light, this is one of the lens that I bring whenever I travel, the other one is the Tokina Macro 100 2.8.