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What Is ISO?

Cameras capture moments through light—ISO determines just how light sensitive a camera is. In film, the ISO isn't a camera setting, but rather the film speed. But what happens when you swap out film for a sensor? What is ISO on a digital...

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What Is Shutter Speed?

Image by Luke Peterson, shutter speed 1/250What is Shutter Speed? The BasicsOne of three elements that affect a photograph's exposure (along with ISO and aperture), shutter speed determines the amount of time that passes while a single image i...