of motion in the background.
of course, if you set your shutter speed very high, then you will be able to stop motion very effectively. remember that with a high shutter speed, you will need to make sure you have enough light to still get a clear, sharp image. a fast shutter speed can be a great way to freeze action no matter if the action is going away from you, toward you or past you. there is something that you need to keep in mind, though. when you use a fast shutter speed, you will completely freeze action. you will lose any motion, so if you are taking an image 