focal-plane shutter

noun

: a camera shutter used chiefly for instantaneous exposures in which a slit in an opaque curtain is passed directly across and in front of the film near the focal plane, the width of the slit and the speed of its movement determining the duration of the exposure

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“Focal-plane shutter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/focal-plane%20shutter. Accessed 22 Nov. 2024.

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