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| f-stop (In photography, a unit on a scale used on camera lenses to indicate a sequence of f-numbers where each stop corresponds to an f-number and with each stop the light that reaches the film is halved) | |||
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| f-stop (In photography, a unit on a scale used on camera lenses to indicate a sequence of f-numbers where each stop corresponds to an f-number and with each stop the light that reaches the film is halved) | |||
