An aperture is an opening or hole, especially the adjustable opening in a camera that lets in light.
From Latin "apertura" meaning "an opening," from "aperire" meaning "to open." The word has kept its basic meaning of an opening or gap for centuries.
In cameras, a tiny change in aperture size can completely transform a photo’s look—sharp background or dreamy blur. The word is used in science, art, and technology anytime a controlled opening changes how something passes through.
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