20mm F3.5 UD lens

flash26c

• Jan 2, 2012

• #1

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

 

JoeA

• Jan 8, 2012

• #2

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

 

OP

OP

flash26c

• Jan 9, 2012

• #3

Thanks Joe - I was trying to buy a 20mm UD but lost out

 

Ralph Javins

• Jan 9, 2012

• #4

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

 

OP

OP

flash26c

• Jan 10, 2012

• #5

Thanks Ralph!

 

puderse

• Jul 10, 2012

• #6

I bought a 20mm NIKKOR in '71 while an Army still photographer. Still using my favoritest lens!