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<rdococ> le//rn aperture// A usually adjustable opening in an optical instrument, such as a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.
author HackBot
date Thu, 13 Apr 2017 02:24:21 +0000
parents e037173e0012
children 7ce82d528d58 d8c9b2b409a6 844290bdd2ef
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