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Thread: DIY Rigid Fresnel

  1. #1
    Peter De Smidt's Avatar
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    DIY Rigid Fresnel

    If you don't like Fresnel lenses as a ground glass viewing aid, then this thread is not for you. I don't want to argue about whether one prefers them. We're adults and can make our own informed choices. I like to be able to see the whole composition easily, and so I prefer them. The method is simple. Buy a rigid Fresnel 2x page magnifier. I bought mine at Staples. Cut it down on tablesaw with the center of the Fresnel at the center of the ground glass. Install on the back of the ground glass with the ridges on the outside. Focus your loupe on the grain of the ground glass. Enjoy. For me, they work best with moderate wide angles, which I use the most. I've tried 3x Fresnels, and for my focal length lenses they don't work as well.
    Last edited by Peter De Smidt; 25-Jul-2019 at 15:48.
    Please stop feeding the trolls.

  2. #2

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    Re: DIY Rigid Fresnel

    Heard.

  3. #3

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    Re: DIY Rigid Fresnel

    This is helpful! I am looking for a fresnel screen. Do you have the fresnel catalog number from Staples?

  4. #4

    Re: DIY Rigid Fresnel

    https://www.ebay.com/itm/2-Magnifier...EAAOSwBahVRS38

    I installed some like these in my Plaubel Makina IIIR and II. I like them!

    I used scotch magic tape to install them on the OUTSIDE of the glass.
    “The secret of getting ahead is getting started.”
    ― Mark Twain

  5. #5
    RedGreenBlue's Avatar
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    Re: DIY Rigid Fresnel

    I'm not sure I understand the suggestion for mounting the fresnel. If the fresnel is mounted on the outside (loupe, not lens side) of the ground glass, and the ridges are facing the photographer, is the loupe pressed against the ridges and potentially damaging them? Or is the fresnel harder than the soft plastic ones I'm familiar with? Or...

    Scott

  6. #6
    Peter De Smidt's Avatar
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    Re: DIY Rigid Fresnel

    Yes, just as Sinar does it. I have A Sinar version that’s decades old. It’s marked up a bit but it works fine. You can always spend $10 in a few years if it gets too scratched.
    Please stop feeding the trolls.

  7. #7
    RedGreenBlue's Avatar
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    Re: DIY Rigid Fresnel

    OK, got it. 5 bucks/year I can afford.

  8. #8
    Alex Timmermans
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    Re: DIY Rigid Fresnel

    Mount it (the ridges) towards the grinded side of your ground glass and it will have the same effect.
    But than it is protected by the glass
    "You dont take a picture, it's given to you"

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  9. #9

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    Re: DIY Rigid Fresnel

    Quote Originally Posted by alex from holland View Post
    Mount it (the ridges) towards the grinded side of your ground glass and it will have the same effect.
    But than it is protected by the glass
    Provided your gg placement is corrected for the Fresnel underneath it to prevent a focus shift.

  10. #10

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    Re: DIY Rigid Fresnel

    Chamonix uses a thin piece of glass over the Fresnel so it doesn't get scratched. Lens > groundGlass > Fresnel > thin glass. The only issue I have with this arrangement is fogging in humid conditions.
    Adventure is worthwhile in itself. ... Never interrupt someone doing what you said couldn't be done. -- Amelia Earhart
    http://www.searing.photography

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