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  1. #21
    Nev
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    Quote Originally Posted by Fotoguy20d View Post
    A triplet is a lens consisting of 3 separate lens cells or elements. Very often they'll have names with tri in them such as Triotar.
    And its these that sometimes will give off a vignette or blur?

  2. #22

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    Quote Originally Posted by ntenny View Post
    Is the last "Xenar" a typo for "Xenotar"? (Xenars were Schneider's Tessar clones, Xenotars their 5-element lenses comparable to the Zeiss Planar or Voigtlaender Heliar.)



    -NT
    nah, actually its not a typo, NT, its only the f2.8 Xenar (not the others) found on folders mostly pre-war that are 5 element lenses with 3 air spaces (its not the same lens as a Xenotar though), its much like a tessar but you can imagine the front element of the tessar divided into two, with an air space between them. Scheider within the factory called them Xenar-S but it is not written on the lens or in their advertising literature, although their old lens booklets do detail the layout but dont mention the 'S' (so 2-1-1-1 configuration)
    Last edited by Anastigmatic; 03-12-2009 at 10:09 PM. Click to view previous post history.

  3. #23

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    Quote Originally Posted by Nev View Post
    And its these that sometimes will give off a vignette or blur?
    See post #13 above.

  4. #24

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    and while i am thowing out unknown 5 element lenses, here another one not often known, some of the Color Solinar are 5 element as well (not the old uncoated ones), they have an extra tiny element cemented in the center (so 2-2-1)

  5. #25
    JPD
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    The five element 2,8 Xenar was available in 5 and 7,5 cm a few years before the war.
    Attached Thumbnails Attached Thumbnails xenar5lins3.jpg  

  6. #26

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    there was also a later 80mm version

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