Camera Lenses: “Fast” vs. “Slow”. Does lens “speed” really matter
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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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Do we really need so many fast lenses in this day and age?
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How to Choose a Camera Shutter Speed: Expert Tips & Tricks
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