Idiom of the Day
cut off (something) or cut (something) off
to shorten something by cutting the ends
The string was too long so I cut off the end.
Shutter speed is a measure of the time the shutter is open, shown in seconds or fractions of a second. The faster the shutter speed, the shorter the time the image sensor is exposed to light; the slower the shutter speed, the longer the time the image sensor is exposed to light.