Shutter Priority Mode
|Shutter Priority MOde Gives you the most control over your shutter speed|
This shooting mode has some very useful purposes. Whenever you care more about the shutter speed of your camera than the f/stop, consider using this mode. Here are some possible applications:
- Panning shots. Perhaps you've seen photographs where a fast moving subject (car, bike) is in focus but the background shows a lot of motion blur. This is achieved by choosing a relatively slow shutter speed and panning with the moving subject. The camera movement tracks with the moving subject, allowing it to be relatively sharp, while the background is completely blurred by the camera's movement. For this to work, it's best to find the shutter speed that works best for the situation and set it in shutter priority mode.
- Flash Sync Speed. Your camera has to sync the time the shutter is open with the flash when it fires. If your shutter speed is too fast, the shutter will block the light from the flash from exposing the sensor. Now some flashes have the ability to compensate for this with "high speed sync," but most internal flashes on SLRs do not. So when your flash is on, if the camera needs a shutter speed faster than its sync speed, it will only fire at its sync speed, and you will get overexposed images. One solution is to switch to shutter priority mode and set the sync speed of your camera (like 1/250sec), and let the camera choose the f/stop that gives you the right exposure. Check your camera manual to find the sync speed of your camera, and if you have an external flash, check to see if it has a "high speed sync" feature.
- Waterfalls. If you know you want to shoot your waterfall at a 2 sec exposure, you can set it in shutter priority mode and let the camera choose the f/stop. Be careful though; if the scene becomes brighter, there may be no f/stop small enough for you to get a proper exposure, even at ISO 100, and you may begin to overexpose your image.