Equipped with or having a diaphragm, especially referring to optical devices, cameras, or mechanical instruments that have a diaphragm component.
From diaphragm + the past participle suffix -ed, used to indicate that something possesses or has been fitted with a diaphragm.
Camera diaphragms (also called apertures) control how much light enters the camera by opening and closing like the pupil of an eye—photographer's terminology literally mirrors eye anatomy because both use the same principle of controlling light with an adjustable opening.
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