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OpenStudy (anonymous):

Aperture is controlled by what in the camera? A.Pentaprism B.Lens C. White balance D.Iris diaphragm

OpenStudy (anonymous):

Iris diaphragm - the same image that's in my icon is an aperture mechanism. Remember that the aperture is what controls how much light enters the camera. The iris diaphragm mechanism accomplishes that.

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