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20mm F3.5 UD lens

  1. flash26c
    For the life of me, I can't remember what the letters UD stand for - can someone help please? Thanks in advance, Ron
  2. JoeA
    JoeA
    Ron,

    Don't know if you ever got your answer here's a link with a good bit of info on lenses:

    http://en.wikipedia.org/wiki/Nikon_lenses

    If I read it correctly the UD indicates 11 elements in the lens.

    ja
  3. flash26c
    flash26c
    Thanks Joe - I was trying to buy a 20mm UD but lost out
  4. Ralph Javins
    Ralph Javins
    Good morning, Ron;

    There was hope that I would find my Nippon Kogaku K. K. reference books, but that has not happened yet with the other activities here. All that I can remember right now is that the Letter "U" was their designation for Eleven (11) Glass Elements in the lens design, but I cannot recall right now the significance of the Letter "D." This was a fairly early Retro-Focus Design NIKKOR lens.

    Enjoy; Ralph, Latte Land, Washington
  5. flash26c
    flash26c
    Thanks Ralph!
  6. puderse
    puderse
    I bought a 20mm NIKKOR in '71 while an Army still photographer. Still using my favoritest lens!
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