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Thread: Krauss Tessar Zeiss 4.5/210 lens

  1. #1

    Join Date
    Jan 2013
    Location
    Leuven, Belgium
    Posts
    14

    Krauss Tessar Zeiss 4.5/210 lens

    Hi,

    I need a quick answer whether this lens will fit 8x10"?
    Anyone who has experience?

    thx
    Maarten

  2. #2

    Join Date
    Apr 2009
    Posts
    257

    Re: Krauss Tessar Zeiss 4.5/210 lens

    It will not cover 8x10.

  3. #3

    Join Date
    Jan 2013
    Location
    Leuven, Belgium
    Posts
    14

    Re: Krauss Tessar Zeiss 4.5/210 lens

    how can one know these things, or can you calculate it? is it lens-dependent ...? I also have nikkor 240mm and that one largely covers 8x10.
    Could the Krauss be a coated lens?

  4. #4

    Join Date
    Dec 2001
    Location
    NJ
    Posts
    8,470

    Re: Krauss Tessar Zeiss 4.5/210 lens

    It is lens dependent. f/4.5 Tessars cover ~ 110 % of their focal length. That's what f/4.5 Tessars do, it is inherent in the design. Your 240 Nikkor is a plasmat; modern lenses of that class, depending on vintage and maker, cover from 62 degrees to 75 degrees.

    If you had a ray-tracing program and the lens' prescription you could calculate coverage. See www.dioptrique.info

    Krauss merged with Barbier, Benard & Turenne in the mid-1930s and the Krauss name was replaced by BBT-Krauss. Your lens wasn't coated when sold, may have been coated after WW-II.

  5. #5

    Join Date
    Jan 2013
    Location
    Leuven, Belgium
    Posts
    14

    Re: Krauss Tessar Zeiss 4.5/210 lens

    Hi, thx for the explanation. Just found a pdf on the net explaining things as well about Zeiss lenses (http://www.arnecroell.com/czj.pdf). So I will not make the bid on ebay for this lens. The search in on again ... ;o)

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