Of the three controls that decide how a photograph looks, shutter speed is the one worth learning first. Aperture and ISO affect brightness and, in aperture's case, how much of the scene stays sharp. Shutter speed does all of that and one thing more: it decides what movement looks like. The same scene at 1/2000 sec and at half a second produces two completely different photographs — one a frozen instant the eye could never have held, the other a smear of motion that no single moment contains. This guide covers what shutter speed is, how it interacts with everything else, and the settings that work for ten specific subjects.
What is shutter speed?
What shutter speed means
Shutter speed is simply how long the shutter stays open, and therefore how long the sensor is collecting light. Nothing is recorded before it opens or after it closes. You will also see it called exposure time in camera menus and specification sheets, which is the more literal description of the same thing.
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