I had the Nikkor 80-400mm for half a year because I wanted to have more of Olympus coming Tele. The picture quality is not so bad, but the AF is simply extremely slow! Since the other Teles are extremely expensive at Nikon, my diverse Sigma xx-500mm from the processing and have not fallen off the picture quality, I manage with currently with a TC 20 III to my 70-200mm VRI. Quality can no trouble keeping up with the 80-400mm and it's also a little easier. If the NF of 80-400mm comes, I'll probably try again.