Single-lens-reflex meaning

sĭnggəl-lĕnz
Of or being a reflex camera in which a movable mirror allows the photographer to see the image in the viewfinder exactly as it will be recorded.
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A reflex camera having a viewing system that allows the photographer to see the subject through the same lens that brings the image to the film or digital sensor.
noun
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See DSLR.
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(photography) Denoting or relating to a type of camera which allows the photographer to view the subject through the same lens that will be used to take a photograph, usually by incorporating a moving mirror and prism.
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Origin of single-lens-reflex

  • From single +"Ž lens (contrasted against a twin-lens reflex camera, TLR), and reflex (“reflection"), the principle by which the image path is diverted.

    From Wiktionary