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aperture

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Definition an opening  — especially a small one that controls the amount of light admitted for a camera or microscope

or:

the measured diameter of the opening
  • The higher the f-stop, the more closed the camera's aperture.
aperture = a small opening  — especially one that controls the amount of light admitted for a camera or microscope

or:

the measured diameter of the opening
  • It wandered along the crest of the hill and terminated before a fragment of wall pierced by a rough aperture which had once been a door.
    Henry James  --  The American
  • He and David were talking intently now about apertures and filters.
    Kim Edwards  --  The Memory Keeper's Daughter
  • apertures = opening sizes that allow different amounts of light into a camera
  • I thrust a torch through the remaining aperture and let it fall within.
    Edgar Allan Poe  --  The Cask of Amontillado
  • aperture = opening
  • At the far end was the stone wall of the corrals, with apertures in the stone that were like loop-holes running all along the face of each corral.
    Ernest Hemingway  --  The Sun Also Rises
  • apertures = small openings
  • David must have been testing the range of his camera, keeping the subject the same and varying the focus, the aperture, the available light.
    Kim Edwards  --  The Memory Keeper's Daughter
  • She sat down on the chair, still warm from his flesh, and looked through the aperture.
    Kim Edwards  --  The Memory Keeper's Daughter
  • She turned and stood before Howard, his head bent over the aperture, watching his hand move across the sketch pad.
    Kim Edwards  --  The Memory Keeper's Daughter
  • The salesman, young and eager, had plied her with technical information about apertures and f-stops and wide-angle lenses.
    Kim Edwards  --  The Memory Keeper's Daughter
  • Within the ranks of his arcane field, an advanced technology called synthetic aperture radar, or SAR, he is an eminence.
    Jon Krakauer  --  Into the Wild
  • aperture = opening
  • The dish, one of the most distinctive landmarks on the Fairbanks skyline, had been erected to collect data from satellites equipped with synthetic aperture radar of Walt McCandless's design.
    Jon Krakauer  --  Into the Wild
  • aperture = opening
  • The next three weeks were a honeycomb of determination with apertures for the days to go in and out.
    Maya Angelou  --  I Know Why the Caged Bird Sings
  • I endeavored, but of course in vain, to look through the aperture.
    Edgar Allan Poe  --  The Pit and the Pendulum
  • By this time they were at the corner, where Edwards and Natty were in the act of drawing the almost helpless body of Benjamin through the aperture.
    James Fenimore Cooper  --  The Pioneers
  • It wandered along the crest of the hill and terminated before a fragment of wall pierced by a rough aperture which had once been a door.
    Henry James  --  The American
  • A soft beam of light fell through the aperture, illuminating the crater's center, though it left the rest of the cavernous expanse in hushed twilight.
    Christopher Paolini  --  Eragon
  • Then he leaned the bushy spruces slantingly against this branch on both sides, quickly improvising a V-shaped shelter with narrow aperture in front.
    Zane Grey  --  The Man of the Forest
  • Raoul turned to the luminous aperture.
    Gaston Leroux  --  The Phantom of the Opera
  • "There's a new one here!" the woman called Frau Mikes called through the aperture.
    Corrie ten Boom  --  The Hiding Place
  • The large-aperture towed array was at the end of a thousand-foot cable.
    Tom Clancy  --  The Hunt for Red October

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