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  1. #1

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    Cheap 6x6 folder with slow shutter speeds for zone plate project

    I have a cheap TLR that I modified with a zone plate replacing the taking lens. Great fun, but the camera doesn't have slow speeds (goes to 1/25 and then bulb). A real handicap with a zone plate, one I "should" have seen before taking the time to build it!!!

    I would like something smaller (thus the folder idea) and I want/need 1 second, 1/2 second, 1/4 (or 1/5), 1/8 (or 1/10) etc. I don't want anything too "good" because I'm removing the lens and basically destroying the camera. It seems really rude to do that to a nice Zeiss folder!

    Suggestions? I have a Moskva-5 6x9 folder that I really enjoy for lightwieght medium format straight (lens) photography. I might just get another (I'm already comfortable with it). But, a smaller camera would be nice and I really want this project to be "square".

    I'm leaving town for Thankgiving with family in a few days. So, please don't feel that I've ignored your suggestions if it take a while for me to respond.

    Tom

  2. #2

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    There are some nice Agfa folders with Compur shutters. And some of the Pronto(r) shutters have slow speeds, although many don't.

    There also are Voigtlander folders with Compur and Pronto(r) shutters with slow speeds.

    I wouldn't pay more than $50 for any of these, so perhaps this might exceed your budget.

  3. #3

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    they say a lubitel is perfect for that ..
    and the zone plate fits in perfectly without
    much of a modification ..

    have fun !

    john
    silver magnets, trickle tanks sold
    artwork often times sold for charity
    PM me for details

  4. #4
    Ole
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    Maybe a zone plate fitted on a Lubitel would count as an improvement?
    -- Ole Tjugen, Luddite Elitist
    Norway

  5. #5

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    Quote Originally Posted by Ole View Post
    Maybe a zone plate fitted on a Lubitel would count as an improvement?


    i just realized the OP wants a folder,
    the trusty lubitel is a TLR
    silver magnets, trickle tanks sold
    artwork often times sold for charity
    PM me for details

  6. #6
    paulfish4570's Avatar
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    What's a zone plate?

  7. #7
    Nicholas Lindan's Avatar
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    Well, what you really need is just a shutter. Any old shutter with slow speeds. You can remove the shutter from your present folder and glue a new shutter on with epoxy...

    Prontor shutters w/o lenses from MP4's go for a few dollars. A cheap oscilloscope camera will have a decent shutter, often with something like a 60mm f1.6 lens.
    DARKROOM AUTOMATION
    f-Stop Timers - Enlarging Meters
    http://www.darkroomautomation.com/da-main.htm

  8. #8
    DWThomas's Avatar
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    Quote Originally Posted by paulfish4570 View Post
    What's a zone plate?
    There is some info here; it's a series of concentric rings with width and spacing calculated to focus using some diffraction magic. It's one thingy I haven't tried yet. You can sort of think of a pinhole as a one-zone zone plate.

  9. #9

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    All of the Agfa's I've seen have not had the slower speeds, but I'll keep an eye out for them. $50 (or even a bit more) is well within budget. Thanks.

  10. #10

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    As far as I know, the Lubitel doesn't have slower shutter speeds.

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