Aperture | Shutter | ISO with light meter - EP 06

Why are there two mechanisms for controlling how much light strikes the sensor? Why do you need both aperture and shutter speed when either one lets you lighten or darken an image? For that matter, why do you then need a third parameter, ISO? The reason is that shutter speed and aperture do more than simply control the brightness in your image.
Presented by Anushka Gunasinghe - / anushka.gunasinghe
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