Nikon 200-400mm f4 ED AI-S Nikkor
I'm not sure if it's fair to say that the Nikon 200-400mm f4 ED Nikkor lens bombed when it was originally available, but Nikon made less than 500 of them between 1983 and 1988, so... yeah. But on the plus side, now it's officially rare as heck. This one is in excellent condition, with only very minor wear from light use and handling. Optics are clean and clear, with minor dust. Smooth focusing and zoom action, clean diaphragm. A very nice example of a very unusual (and useful!) lens. Includes its original HE-2 hood and 122mm UV filter.