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Thread: Removing a 21" Kodak Ektanon from a Prism

  1. #1

    Removing a 21" Kodak Ektanon from a Prism

    I just acquired a really nice Kodak 21 1/4" Ektanon that was shipped to me in a Kodak 3.5" prism.

    The bottom of the barrel lens screws out and the bottom of the front element but not the front element.

    Any experience out there as to what I need to do to in getting the front element out of the prism housing?

    Thanks in advance!

  2. #2
    Eric Woodbury
    Join Date
    Dec 2003
    Posts
    1,637

    Re: Removing a 21" Kodak Ektanon from a Prism

    For the record, I'd love a photo of this. Why is there a prism?

    Warm solvent soak is my guess, but I don't know anything.

    e
    my picture blog
    ejwoodbury.blogspot.com

  3. #3

    Re: Removing a 21" Kodak Ektanon from a Prism

    Clear up your PM space and I will send you photos. Trying to send you a PM.

  4. #4
    Photographer
    Join Date
    Feb 2001
    Location
    Pine Junction, CO
    Posts
    992

    Re: Removing a 21" Kodak Ektanon from a Prism

    Quote Originally Posted by Michael Kadillak View Post
    Clear up your PM space and I will send you photos. Trying to send you a PM.

    Post a pic on the Forum. Without seeing it,you’ll get lots of lame suggestions.
    Keith Pitman

  5. #5

    Join Date
    Jan 2019
    Posts
    316

    Re: Removing a 21" Kodak Ektanon from a Prism

    Quote Originally Posted by Eric Woodbury View Post
    For the record, I'd love a photo of this. Why is there a prism?

    Warm solvent soak is my guess, but I don't know anything.
    Large front prisms were common on process camera lenses. For example see this Wollensak catalog: http://www.cameraeccentric.com/html/...llensak_2.html

    I think the main reason was to reverse the image so that it could then be used to make a correct image during reproduction (like the way that a woodblock for printing has to be in reverse).

  6. #6

    Re: Removing a 21" Kodak Ektanon from a Prism

    On my 21" Kodak Ektanon there was a silver ring on the prism which rotated a few degrees and the lens pulled off. I sold the lens years ago but kept the prism. I never found use for it, but is beautifully made.

  7. #7

    Re: Removing a 21" Kodak Ektanon from a Prism

    Click image for larger version. 

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    As per suggestions attached are images showing the prism with the last image showing the bottom section of the barrel with one section coming off of the top section of the lens. The remaining top section of the lens is what is locked in there. I have only tried to unscrew it with my hands to this point and it is not moving hence my decision to reach out.

  8. #8

    Re: Removing a 21" Kodak Ektanon from a Prism

    Disregard my suggestion, your prism is different from mine.

  9. #9

    Join Date
    May 2009
    Location
    Norwalk Ca.
    Posts
    696

    Re: Removing a 21" Kodak Ektanon from a Prism

    Look around for any set screws.

  10. #10

    Re: Removing a 21" Kodak Ektanon from a Prism

    Quote Originally Posted by Michael Clark View Post
    Look around for any set screws.
    Great suggestion Michael. It appears that there are some small screws on the exterior of the prism that may allow me to take out the outside transparent cover of the prism and possibly other segments. Then I may be able to get a flashlight to the inside of the prism to see if there are any screws holding this from the inside. Will report shortly. Thanks!

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