Shutter Priority (Tv or S)
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Similarly to aperture priority, this is another ‘semi-automatic’ shooting mode, though in this instance, you asthe photographer set the shutter speed and the camera will take care of the aperture. The shutter speed, measured in seconds (or more often fractions of a second), is the amount of time the shutter stays open when taking a photograph. The longer the shutter stays open, the more light passes through to the sensor to be captured.You would select a short shutter speed if you wanted to freeze a fast moving subject, such as shooting sports, action or wildlife, for example:A very fast shutter speed of 1/4000thsec was used to freeze the motion ofthis grouse in flightYou would use a long shutter speed if you wanted to blur a moving subject, for example water rushing over a waterfall (slower shutter speeds will require you to put the camera on a tripod to ensure the camera is held steady whilst the shutter is open):To capture the motion of the waves, and render the water with a soft, milky texture, a shutter speed of 6 seconds was used hereSo whilst you worry about what shutter speed you need for a given photograph, the camera will determine the appropriate aperture required to give the correct exposure.Aperture and shutter priority shooting modes may be semi-automatic, meaning that some may deride their use because they’re not fully manual, however they are incredibly useful modes to shoot in that can give you enough creative control to capture scenes as you envisage them.
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