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  1. #1
    gandolfi's Avatar
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    homemade shutter (BIG)..

    I have a really nice "norka" barn door shutter in my possession.

    A student of mine has decided to build him self a big camera, so he "just" copied the shutter, but made it MUCH bigger..

    I am quite impressed! it works fine. The fun part was to hear where he got the bits and pieces for it.. (his father is a doctor, so some stuff comes from a doctors office - some come from the inside of an old broken DVD player... and so on.

    I'll show you a couple of images here. First the original Norka - then Christian's.

    (maybe there could be a market for this? I hear all the time, that people wants a BIG shutter for their BIG lenses, and this will accept very big ones.!)

    Anyway, I was surprised how "easily" he made this lens.

    But it needs a large lens board.

    (I'll check the exact mesurements tomorrow and provide them..
    Attached Thumbnails Attached Thumbnails norka-open.jpg   IMG_0097.jpg   IMG_0100.jpg   IMG_0108.jpg  

  2. #2

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    Are these photos of a lens as such?

    Tom

  3. #3
    OMU
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    Piston for a barn door shutter?

    Hello;

    I have been lucky and could by a "Norka studio camera" a few days ago.
    The barn door shutter needs a new piston (stempel) and a new air bulb.
    As usually, I searched the web. Got two hits, both from a gentleman called "Gandolfi"....

    Any suggestion of what I can use as a piston (stempel)?
    Attached Thumbnails Attached Thumbnails IMAG0056.jpg   IMAG0057.jpg   IMAG0065.jpg  

  4. #4
    the-new-old-school's Avatar
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    That's pretty creative to be able to build something like that. Also find it kinda funny that there is a little tube of 35mm next to it in the pics.

  5. #5

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    OMU : you could try a pneumatic (air ) release : commonly available,and comes complete with tubing and a rubber bulb.

  6. #6
    OMU
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    Hallo Emil;

    To night I have made a new ground glass. Bought velvet grinding pasta and used 15 min and I had a perfect new ground glass. No problem at all. Works perfectly :-)

    No I have to solve the problem with the shutter. I'll try to find anyone that sells me that kind of pneumatic release you recommend.

  7. #7

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    Thanks, that's very inspiring. I tried to build shutters myself, but size was always a problem. The biggest so far was a spring (actually rubber band) driven guillotine shutter with 2,75" diameter opening and that one's already monstrous and hard to build bigger. Well, at least it gave me about 1/80 sec as minimum reproducible speed.
    Which brings me to my question: How fast can you go with these barn doors? At this size, it's hard to imagine, they'd be much faster than the good old hat exposure.

  8. #8
    OMU
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    Hello Moki;
    I realy don't know howe fast it can go before I solve the problem with the release.
    But, when using the camera in a dark studio/room. It's so litle light that influens the film, that is't any problem. The light from the studioligt dominates the exsposer.
    But, I'l work with the shutter anyway.

  9. #9

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    I don't have any large format, but those look neat none the less!

    Jeff



 

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