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Developed by Alexander S. Wolcott and John Johnson, Wolcott camera was originally design for daguerreotype. Unlike other cameras, a daguerreotype plate in a Wolcott camera is placed in front of focusing system, and is counter-face its object, since the camera uses a concave mirror to project the image. An opening in top of the camera acts as a viewfinder, and a white screen is placed in a moveable plate holder to see if image is in focus, before the plate is loaded. At the end of exposure, a sliding shutter keeps the plate from further exposure.

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17y ago

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