In photography, shutter speed is a common term used to discuss exposure time - the effective length of time a camera's shutter is open. It is measured in seconds or more often fractions of seconds.

Those stepping out of auto mode will need to learn about three essential settings in photography: aperture, ISO, and shutter speed. These are commonly referred to as the “exposure triangle,” as one ...

Your dSLR's (or ILC's, or enthusiast compact's) Shutter-priority mode is perfect when you care about shutter speed beyond all else. Here's what you need to know to use it. Lori Grunin Senior Editor / ...