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Focal-plane shutter

[foh-kuh l pleyn] /ˈfoʊ kəl ˌpleɪn/

noun, Photography.
a camera shutter situated directly in front of the film.


Read Also:

  • Focal-plane

    noun, Optics. 1. a plane through a focal point and normal to the axis of a lens, mirror, or other optical system. Compare . 2. the transverse plane in a telescope where the real image of a distant view is in focus. noun 1. the plane that is perpendicular to the axis of a lens […]

  • Focal-point

    noun 1. Also called principal focus. Optics. either of two points on the axis of a mirror, lens, or other optical system, one point being such that rays diverging from it are deviated parallel to the axis upon refraction or reflection by the system and the other point being such that rays parallel to the […]

  • Focal-ratio

    noun, Optics, Photography. 1. . noun 1. (photog) another name for f-number

  • Focal reaction

    focal reaction n. A limited reaction that occurs at the point of entrance of an infecting organism or of an injection. Also called local reaction.

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