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Waterhouse stop

From Wiktionary, the free dictionary

English

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English Wikipedia has an article on:
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Etymology

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Invented by photographer John Waterhouse in 1858.

Noun

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Waterhouse stop (plural Waterhouse stops)

  1. (photography) An interchangeable diaphragm with an aperture for controlling the entry of light into a camera.
    Synonym: Waterhouse diaphragm
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