Shutter Speed The shutter speed is the amount of time a film or sensor is exposed light to form the image. The shutter speed can be either seconds or fractions of a second. Exposure times of one second or more are expressed as whole numbers 1,2,4,8,16 each allowing twice the amount of light through to form the image as the previous. Exposures times of less than one second are 1, ½, ¼, ⅛, 1/15, 1/30, 1/60, 1/125, 1/250 1/500, 1/1000.
What’s important to know: A slower shutter speed allows more light to enter your lens in darker environments as the sun sets or on cloudy days. However a slower (or lower) shutter speed (especially below 1/10) can make your shot blurry because your lens is open longer, so it’s best to stabilize your camera on a still surface or with a tripod (see below).
With interiors, you can work with slow shutter speeds, but when shooting people in action you’ll end up with blur. But since this is an article about interiors, and not action shots, always consider you do have that added option of slowing the shutter speed to 1/10 or below to allow more light to enter the lens because your subject isn’t moving.