http://www.nikonchat.com/nikkor-50mm-1-2/
Why are lenses so cheap?
Nikon (Nikkor) 50mm 1.2 lens I see them for $ 65 dollars, to me this seems like an amazing deal?
Nikon has made several variations of this objective, some of them in very large quantities. Therefore, it is not uncommon. A few of these you need a hardware modifcation before they can be used in cameras today. They are also an age that fungi may play a role. So … not uncommon, possibly in poor condition can require modifications in addition to the fact that sometimes you can find a useful 50mm f1.2 for less than $ 100, so be sure to read the fine print or ask about status
nikon nikkor 50mm f1.2 AI-S VIDEO TEST
Nikon News