@ msmoto Nikon will sometimes say a combination will not work when it actually does function under some good conditions. They like to error on the conservative side so no one can get into a hassle about promising something which is not true.
I am sure that this is true and makes the dissemination by users of the real day to day possibilities, without 'corporate responsibility' getting in the way, very important.
On a related note, the reason this is all important to me, and I suspect others, is that I can neither afford nor justify the purchase of a 300mm f2.8, or more pertinently, a 600mm f4- however much I would like one....or both! Therefore, the performance of the 300mm f4 and TCs of various strengths is of great interest. This is in fact why I got the D800, not for the 36 megapixels or the video (I don't shoot video and my D700 had ample sensor resolution for me) but for the ability of the sensor to accept good AF performance at maximum apertures of f8. Thus, when I can afford one, I will get the TC 2.0 III and have a usable 600mm lens set up. The D800 and TC2.0 III is a CHEAPER option-by about half- than purchasing a 300mm f2.8 and TC2.0 III. I know it still is not going to be quite as good as the f2.8 option but I am not in a position to choose this anyway. Perhaps I would if I was able to justify it from professional earnings but wildlife photography is a hobby, not my professional photographic sphere. Maybe one day!
