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Thread: Advice for new Groundglass / Frensel for Speed Graphic

  1. #1

    Join Date
    Jun 2009
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    38

    Advice for new Groundglass / Frensel for Speed Graphic

    I have a Speed Graphic Pacemaker that have a old groundglass and a frensel that i like to exhange with a better groundglass and eventually a new Frensel

    I have read that those Speed graphics that come with a frensel, need to have always one otherwise the focus will be not correct. Is it true?
    Anyone have a advice /experience what groundglass / frensel i could use?
    Lambis Stratoudakis
    www.apneaimages.com/blog

  2. #2
    Dave Karp
    Join Date
    Dec 2001
    Location
    Los Angeles, CA
    Posts
    2,954

    Re: Advice for new Groundglass / Frensel for Speed Graphic

    I have an old Crown Graphic with a Fresnel lens. When I first got it, the image on the GG was dim. I kept thinking I needed a new GG and/or Fresnel. One day I removed them, washed them off with lukewarm water and gentle soap, and replaced them. Voila, everything was nice and bright. I have not used a Maxwell, but the GG/Fresnel combination in my Crown is the nicest such combination I have used, including those in my ARCA and Walker Titan.

  3. #3
    IanG's Avatar
    Join Date
    Jan 2007
    Location
    Aegean (Turkey & UK)
    Posts
    4,122

    Re: Advice for new Groundglass / Frensel for Speed Graphic

    My Crown Graphic has a screen from Steve Hopf, when I firts fitted it I was very disappointed it seemed dim, but I fitted a fresnel 6 months agp and the combination is superb.

    In my case the fresnel is fitted to the rear of the screen (externally) so there's no focus plane issue, it's still slightly less efficient than my Wista combination screen.

    Ian

  4. #4

    Join Date
    Oct 2004
    Location
    S.W. Wyoming
    Posts
    1,137

    Re: Advice for new Groundglass / Frensel for Speed Graphic

    If the camera is equipped with a fresnel screen you must use one of the same thickness, or shim the ground glass to the original position. If you don't pay careful attention to these issues it will throw the plane of focus off. There's no reason I can think of that would make the screen dim, other than dirt or heavy scratches. Well, that and an f/12.5 lens. Try cleaning your screen with warm, not hot, water with a little dish soap. Don't rub the fresnel with anything but your fingers. It scratches easily.

  5. #5
    Just waiting to be developed..
    Join Date
    Feb 2007
    Location
    New Rochelle, NY 10804
    Posts
    502

    Re: Advice for new Groundglass / Frensel for Speed Graphic

    The Crown graphic fresnels come up on ebay every now and then.
    I found a brand new one a few years ago for under $20.
    Mine was very scratched up from 50+ years of abuse. The new one really helps.
    -Ian Mazursky
    www.ianmazursky.com Travel, Landscape, Portraits and my 12x20 diary
    PrePress Express

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