Shutter priority mode
This shooting mode is very useful when dealing with the problem of a moving subject. For example, a car traveling at a speed of 50 km/h is doing about 13.8 m/sec. So, if you use a shutter speed of 1 sec, you will obtain an image with background, but no subject!
At this shutter speed (1 sec.) the car has moved almost 14 m; in the best case you might get a trail of the shadow of the car… What you need to do is to freeze the action. To "make" the car appear to be still, you'll have to use a shutter speed of 1/2000 sec. Even at this shutter speed, the car has moved about 7 mm... not a very clear picture. So, if your camera allows it, you'll have to push the limits of the shutter to 1/4000 sec.! Also you can move your camera, tracking the car. In this situation, the car appear to be standing still, while the background will be blured.
However, the shutter can also be set for a long exposure time. This allows for the very useful effects, particularly useful for night photography. These long exposures always require the use of a tripod to steady the camera.
Shutter Priority | Shutter Speed 1/13 | Aperture Value 2.5
Shutter Priority | Shutter Speed 0.6 | Aperture Value 8
Shutter Priority | Shutter Speed 1/320 | Aperture Value 3.5
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