The shutter is like a door, it opens and closes to let light into the camera to expose the film, or sensor to light for a set time. Shutter speed is measured in seconds – or in most cases fractions of seconds. The bigger the denominator the faster the speed (ie 1/1000 is much faster than 1/30).
Shutter Speeds:
1 2 4 8 15 30 60 125 250 500 1000 2000 4000
The lower the number, the slower the shutter speed, the greater amount of light and blur.
The higher the number, the faster the shutter speed, lesser amount of light and blur.
B-Bulb: When you press the Shutter, it opens for as long as you keep your finger on the shutter button
T-Time: When you press the Shutter button, it stay open until you press it again (not common on newer cameras).
Guess what shutter speed was used for the following photos:
by Dan Barham
