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  1. #11
    Photo Engineer's Avatar
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    Try an RV supplier. They are used in RVs to assist in rear view.

    PE

  2. #12
    Dave Wooten's Avatar
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    Go to amazon, they have a good selection
    [FONT="Arial Black"][/FONT]

  3. #13

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    Quote Originally Posted by Photo Engineer View Post
    Try an RV supplier. They are used in RVs to assist in rear view.

    PE
    The fresnels used for backing / parking vans and RVs are negative focal lengths (divergent) and not what is needed for "screen brightening". A negative FL fresnel will actually worsen the "hot spot".
    Tracy Storer
    Polaroid 20x24 Studio West
    www.mammothcamera.com

  4. #14

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    I've purchased from these people with good service. Their superfine fresnels are good - you just have to cut them down. I think I purchased the #F550 (under Large Fresnel Lenses) and it works great. The 200mm focal length would probably be good for wide angle lenses. Get the optical acrylic ones... the PVC ones are thin and soft, but cheap, so good for experimenting with.

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