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Rick Sammon's Exploring Photographic Exposure by Rick Sammon

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2Shutter Speed and Subject Movement

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Shutter speed is about time—the time during which the shutter is open to record an image on an image sensor. That length of time affects subject movement.

Shutter speeds on digital SLRs and mirrorless cameras can range from 1/8000th of a second or so to as long as you want to leave the shutter open. Basically, you want fast shutter speeds to stop action when you or the subject are moving.

I photographed this seal in Iceland’s Jökulsárlón Glacier Lagoon while we were exploring by Zodiac. To prevent a blurry photograph caused by the movement of the boat and the telephoto lens factor (which exaggerates camera ...

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