Camera Lenses: “Fast” vs. “Slow”. Does lens “speed” really matter

A lens’s adjustable aperture — its iris diaphragm — controls the amount of light coming through the lens over time (controlled by the shutter). The wider its maximum opening, the “faster” any lens is…

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Camera Lenses: “Fast” vs. “Slow”. Does lens “speed” really matter that…, by Chuck Haacker, Counter Arts

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