Exhibit: Focimeter. It is impossible to obtain well-defined photographic pictures, without previously ascertaining the exact position of the photogenic focus, which is easily done by taking the image of the focimeter on a photographic surface, and comparing the segments of the apparatus with the image, then on the ground glass and the photographic surface.

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Record 293 of 16543

Exhibition:	1851, London, Great Exhibition	More from this exhibition >
Exhibit number:	296.04, v 1, Class 10, United Kingdom

Photographer:	Claudet, Antoine François Jean (1797-1867)	More by this photographer >
Full title:	Focimeter. It is impossible to obtain well-defined photographic pictures, without previously ascertaining the exact position of the photogenic focus, which is easily done by taking the image of the focimeter on a photographic surface, and comparing the segments of the apparatus with the image, then on the ground glass and the photographic surface.
Process:	Not Listed [Apparatus]	More by this process >

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Exhibitor:	Claudet, Antoine François Jean

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