They will work in Aperture Priority mode as well...You just have to enter the lens data into the camera first (at least that is the way I do it on my D300, I can pre load up to 9 different lenses).. Of course you won't get auto focusing, but you will get metering in either A or M modes... Oh, the even older Ai lenses will work just like Ais lenses....The even older Pre-Ai (or Non-Ai as some people prefer to call them) must have been Ai modified in order to mount them safely...
MT Shooter wrote:
AIS is Auto Indexing Shutter, and they will work on your D800, but in full manual mode only.