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  1. #1
    Founder QT Luong's Avatar
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    New article: guillotine shutters

    A new article by Bill Kumpf on a DIY guillotine shutter has been posted. It is composed of two parts:
    Constructing a simple shutter
    and
    Determining shutter speeds

    Comments are welcome in this thread.

  2. #2

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    Re: New article: guillotine shutters

    Here we go once again...
    Not commenting on the unusually thick guillotine blade and the choice of its material one thing should be said - this kind of shutter condemns your camera to horizontal positions mostly. As soon as you tilt it you start to get different results. Sometimes less, sometimes more, sometime off in an unacceptable way, etc.

  3. #3

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    Re: New article: guillotine shutters

    Even given the limitations, I think an availability of these would help many people make the leap to trying barrel lenses. The guillotine shutter is easy to understand and this one attaches with rubber bands. Mounting packards on lens boards can be intimidating and a hassle and expensive if you have to buy the packard shutter.

    If I had any woodworking skills at all, I'd make some of these and loan them out to people. I suspect many people out there would love to be trying old brass barrel lenses, etc, and just don't know where or how to start with it.

  4. #4

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    Re: New article: guillotine shutters

    Quote Originally Posted by Richard Rankin View Post
    ...

    If I had any woodworking skills at all, I'd make some of these and loan them out to people. I suspect many people out there would love to be trying old brass barrel lenses, etc, and just don't know where or how to start with it.
    Richard, you don't need any woodworking skills at all. You can make the thing out of PVC sheets with many advantages over wood (better slipping, no dimensional changes when wet, easier manufacturing etc.)
    But to loan them you would need a lot of different diameters to satisfy your customers' different lenses...

  5. #5

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    Re: New article: guillotine shutters

    And if you wanted to make a De luxe version you could put a small drop of oil between the blades to make it slip with less friction even in more inclined positions. Olive oil (extra virgin) would do...;-)

  6. #6

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    Re: New article: guillotine shutters

    Quote Originally Posted by GPS View Post
    And if you wanted to make a De luxe version you could put a small drop of oil between the blades to make it slip with less friction even in more inclined positions. Olive oil (extra virgin) would do...;-)
    Delrin yes - olive oil no

  7. #7

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    Re: New article: guillotine shutters

    Quote Originally Posted by Lee Hamiel View Post
    Delrin yes - olive oil no
    Red herrings yes - Red Socks no.

  8. #8

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    Re: New article: guillotine shutters

    Quote Originally Posted by GPS View Post
    And if you wanted to make a De luxe version you could put a small drop of oil between the blades to make it slip with less friction even in more inclined positions. Olive oil (extra virgin) would do...;-)
    Using oil will actually slow the drop. I tried it.

  9. #9

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    Re: New article: guillotine shutters

    It seems the idea of a simple shutter got lost along the way, though I did appreciate the ingenuity.

    As for the matter of being committed to horizontal exposures as mentioned on page 1, simply calibrate for a vertical exposure, and when you rotate the back subtract 1/4 for a 4:5 proportion, or 1/3 for a 2:3. If you have to rotate the camera, same calculations, just mount the shutter to allow rotating it 90 degrees.

  10. #10
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    Re: New article: guillotine shutters

    I would use plastic, preferably UHMW polyethylene, or cutting-board material. It is very slippery.
    Science is what we understand well enough to explain to a computer. Art is everything else we do.
    --A=B by Petkovšek et. al.

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