Aids to drawing: The field camera' Sketching with the aid of a portable tent-type camera obscura. Behind the lens mounted on top of the tent is a mirror angled at 45 degrees. The image collected by the lens was reflected in the mirror and projected down on to a sheet of white paper. Engraving from 'The Science Record' (New York, 1874).

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Aids to drawing: The field camera' Sketching with the aid of a portable tent-type camera obscura. Behind the lens mounted on top of the tent is a mirror angled at 45 degrees. The image collected by the lens was reflected in the mirror and projected down on to a sheet of white paper. Engraving from 'The Science Record' (New York, 1874).

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

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