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Thread: old E.Krauss's F

  1. #1

    Join Date
    Jul 2010
    Posts
    35

    old E.Krauss's F

    I got a Anastigmat Zeiss 1:6.3 F 250mm By E.Krauss recently. The number on barrel:256; 128; 64; 32; 16; 8; 4.I guess where "256" looks like "F 6.3"(open). Who tell me that the corresponding F value?
    Thanks
    Daytona

  2. #2

    Join Date
    Jan 2009
    Location
    Denmark
    Posts
    6,246

    Re: old E.Krauss's F

    There is a useful table here on this website.

    Table of older aperture systems
    Scanned by David Stein

    This is a product developed by Zeiss and the "reverse" scale is the one used by Zeiss early on.
    Your lens is a Serie II Zeiss Protar size 6 which covers more than 13x21cm. The Krauss versions have a good reputation.

  3. #3

    Join Date
    Jul 2010
    Posts
    35

    Re: old E.Krauss's F

    Quote Originally Posted by Steven Tribe View Post
    There is a useful table here on this website.

    Table of older aperture systems
    Scanned by David Stein

    This is a product developed by Zeiss and the "reverse" scale is the one used by Zeiss early on.
    Your lens is a Serie II Zeiss Protar size 6 which covers more than 13x21cm. The Krauss versions have a good reputation.
    Thank you for your help.
    Daytona

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