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1890s Photographic Exposure Meters

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Camera Accessories138 of 1698mm projectorsWWII Film Developer
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    Posted 10 years ago

    rniederman
    (330 items)

    Yep … pre-1900 photographers needed a little assistance to figure out how to make good pictures; and it wasn’t all that easy. There were an amazing variety of devices and methods to measure light from the early 1880s on. Here are two brass examples in my collection.

    On the left is Decoudun’s visual meter (patented 1887) with its original cardboard box. It was placed against a view camera’s focusing screen. While under a dark cloth, the photographer turned a center knob until three small holes in an oval slot appeared to disappear while a larger hole remained visible, etc. An exposure table is then referenced in the reverse side and the camera's shutter and other mechanics adjusted.

    Watkin’s Standard Meter of 1890 is a nicely machined tubular body with lots of levers and scales – very cool looking. It has a compartment in one end to hold a roll of sensitive paper that is exposed through a hole in an end cap. The time it took for the paper to darken is compared to a sample. Elapsed time is then measured by swinging another end cap attached to a chain; which is designed as a one-second pendulum. Exposure calculation involved manipulating the adjustable levers and scales. In all honesty, I’ve yet to figure out how this works.

    Although I like antique equipment and my first 35mm cameras were completely manual, it sure is nice that today’s cameras automatically adjust themselves!

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    Comments

    1. rniederman rniederman, 10 years ago
      Thanks BELLIN68, packrat-place, AR8Jason, and officialfuel!
    2. JohnKratz JohnKratz, 10 years ago
      Ahh those meters are fantastic! Seems you can't collect cameras without also accumulating at least a small collection of meters as well. Mine includes an old Watkins Bee and a Heydes meter, although I haven't been able to date them very accurately.
    3. rniederman rniederman, 10 years ago
      Hey John ... yep, your're spot on ... gotta have meters, flash ignitors, ground glass magnifiers, etc. As an FYI, the Watkins Bee dates to around 1903 (+/-). There is a deluxe "Queen Bee" version made of silver that also includes a 1-second pendulum. I saw one nearly 10 years ago; pretty thing. Should I assume you have the Gustav Heyde's Facile Actino-meter? If yes, that would be about 1904. BTW, you're now obligated to post meters as well.
    4. rniederman rniederman, 9 years ago
      Thanks, Bootson!
    5. rniederman rniederman, 4 years ago
      Thanks, oldpeep!

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