CAMERA OBSCURA • FREE TRANSLATOR.ORG • Definition of Camera obscura

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noun

Camera obscura n. (Opt.)

An apparatus in which the images of external objects, formed by a convex lens or a concave mirror, are thrown on a paper or other white surface placed in the focus of the lens or mirror within a darkened chamber, or box, so that the outlines may be traced.

(Photog.) An apparatus in which the image of an external object or objects is, by means of lenses, thrown upon a sensitized plate or surface placed at the back of an extensible darkened box or chamber variously modified; commonly called simply the camera.

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Etymology of 'Camera obscura'

Collaborative International Dictionary of English 0.48

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"Camera obscura" Quotes from Famous Books

... a Paper, which is accommodated to receive them; and so he traceth them with his pen in their natural appearance; turning his little Tent round by degrees, till he hath designed the whole Aspect of the Field." [Reliqui Wottonianae, (london 1672), p. 300.]—In fact he hath a CAMERA OBSCURA, and is exhibiting the same for the delectation of Imperial gentlemen lounging that way. Mr. John invents such toys, writes almanacs, practises medicine, for good reasons; his encouragement from ...

— History Of Friedrich II. of Prussia, Vol. III. (of XXI.) - Frederick The Great—The Hohenzollerns In Brandenburg—1412-1718 • Thomas Carlyle