WHAT IS SHUTTER SPEED?

So what is shutter speed? Shutter speed is the setting on your camera that decides how long the shutter should open. The longer the shutter opens, the more the amount of light is captured on the sensor. This is a mirror though, behind it is the shutter, which is right in front of the sensor

Think of it as your eye lids. The shutter is basically a closed eye lid, once the shutter button is clicked, the eye lid opens and closes. By setting the shutter speed, you’re telling the camera to duration to keep the eye lid open.

For our human eye, the longer the eye lid is open also means more light has entered the eye. Stare at some bright lightbulb for half a second and your eyes barely hurt. Stare at the bright lightbulb for 5 seconds and you’re stuck with the ghost of the lightbulb. The same concept applies to shutter. Assuming all factors (like aperture and ISO) remain the same, the longer the shutter is opened, the more exposure you get – which is why another common term for Shutter Speed is EXPOSURE TIME.

I prefer to use the term EXPOSURE TIME as I find it to express the purpose of having the shutter movement better, but for the sake of this article I’ll use Shutter Speed as I think it’s the more commonly used term.