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AUTOMATIC APERTUREAn automatic aperture remains fully open until the shutter is released, at which time it closes down to the pre-set aperture size in order for the picture to be properly-exposed. An automatic lens has [..]
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AUTOMATIC APERTUREAn automatic aperture remains fully open until the shutter is pressed, which then allows the aperture to close to a size predetermined by a light meter within the camera. All point & shoot cameras maintain an automatic aperture.
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