I got one of these lenses, looks like a projection lens to me, chrome barrel, no iris, but with a focus mechanism. The text on the barrel is: 14" EF WOLLENSAK - ROCHESTER U.S.A.
The interesting part is: after I took it apart for cleaning, I found out that it has 2 groups, one group has 2 cemented elements (a thick one and a thin one, at least from the rims of the glass. ).
The other group has 2 elements, but not cemented, the inside element is a positive element (thinner), and outside element is a negative (thicker). The 2 elements are very close to each other, actually the outside glass rims of the 2 elements are touching each other, almost like they could be grouped together.
Here is a picture of it.
http://s94121683.onlinehome.us/images/lens/PIC00003.jpg
The dia of the front lens glass is 1 7/8", but there is also a metal ring, so effective openning is 1 1/2, that will put it at f9?
My question is: What formula of this lens can be? Petzval? Rapid Rectilinear?
Thanks,
Wenbiao
Bookmarks