The old homemade shutter tester.

Discussion in 'Camera Building, Repairs & Modification' started by Sjixxxy, Dec 26, 2004.

  1. Sjixxxy

    Sjixxxy Member

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    I want to do the old DIY soundcard shutter tester originally presented here. Digging around I found this little snippet at http://medfmt.8k.com/mf/shutterspeed.html on how to make the readings more readable at high speeds.

    I haven't done much with circuits in a long time, would some one be able to translater how that into a scematic for me?

    I should note that I want to build this to test the Focal Plane shutter on my Speed Graphic, so I have an idea this idea in my head. What Id like to do is build two of these circuits, and mount them both into one old leaky filmholder I have. I'd drill two holes though it too mount the two sensors, one at the top, and one at the bottom. This way I could measure any slow down as the shutter travels. I haven't noticed any horrible effects of any, but I'm a geek and want to know if it is there, and how much it is. :tongue: Also, I'd keep the darkslide in closest to the shutter, and drill small holes into it lining up with the photosensors, to get rid of any light coming from elsewhere(like the rest of the huge shutter slit) from messing up the readings.

    And major flaws with this logic that I'm missing? Ideas for improvement?
     
  2. esearing

    esearing Subscriber

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    I have a Calumet Shutter tester I'll sell you if you decide it's too much of a hassle to build one. This works with LF lenses or any type of in-camera shutter. You can test Left,Center, and Right, or high/low to determine shutter bounce/lag.

    PM me here if interested. Else I may post it later in the buy/sell forum.
     
  3. buggzz

    buggzz Member

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    Probably something like this, Please excuse the overall crappy-ness of the drawing. It should give you the idea.

    Ken.

     

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  4. JHannon

    JHannon Member

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    Here is a link for another tester Shutter Tester

    I never tried it but it looks interesting.

    Regards,
    John