A friend of mine has recently told me that there exists an extremely rare Nikon 180mm f/2.8, it was a transition lens -- as he calls it, and was released between the 180/2.8 ED (gold ring) and 180/2.8 AF.
He claims that this lens is extremely rare. I can't find any information on it whatsoever. I've looked at Mir and dug deep into google images, nothing to be found.
I would appreciate some information on this lens, or verification that it may not exist at all. I wouldn't doubt it however, Nikon does have some of these very rare lenses that has little to no information about them. A transition 180mm sounds pretty plausible to me.