If you are shooting sports, chances are you are going to want to freeze their motion. To freeze motions that a person can do, your shutter speed needs to be at least 1\/640 second. This will freeze a scene with small human motions in it, for example, a jogger or a friendly game of Ping-Pong. Faster shutter speeds will freeze quicker motion, for example, the moving arm of a baseball pitcher or a sprinter.<\/p>\n
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\u00a0<\/a>![\"\"](\"http:\/\/media.npr.org\/assets\/img\/2013\/09\/04\/123706331_sq-dd4f3feb80732ae58135cf86b9f3efec14712c8c.jpg\")
<\/a><\/div>\nIf you are shooting a waterfall, chances are you are going to want to let the motion of the water blur out a little bit. \u00bd second is a little bit of blur; an exposure of several seconds will turn moving water into a misty, creamy blob.<\/p>\n
There is a down side to this secondary effect: Camera motion<\/strong>. Generally, one wants the camera to be perfectly still during an exposure. For example, the camera in this waterfall picture had to have been secured to a good, solid tripod during the exposure. Here is an image grabbed from the Internet that shows what camera motion blur looks like. There are several technical ways to avoid camera shake.<\/p>\n<\/a><\/p>\n
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