The primary function of these lens openings is to control the volume of light that reaches the film or digital media during an exposure. The smaller the f-stop number, the larger the lens opening; the larger the f-stop, the smaller the lens opening.
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The Coolest Light-Painting Device Yet - 2 views
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Basic Photo Tips: Aperture, Shutter Speed, and ISO - photo.net - 0 views
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Try the exercise here. Set your camera to manual and find a shady spot.
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If my camera is set for ISO 100, I have, in effect, 100 worker bees; and if your camera is set for ISO 200, you have 200 worker bees.
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Aperture, Shutter Speed, and ISO
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