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Old Jun 20, 2004, 1:32 PM   #1
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Can someone tell me why would I need a sutter speed above 2000, and just what is Noise in a picture?


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Old Jun 20, 2004, 3:16 PM   #2
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Noise looks somewhat like grain in film cameras. The higher the ISO the camera shoots at the greater the noise in a given camera. Also the more densely packed the sensors in the CCD the more noise a camera will generally generate.

When noise is at a fairly low level it is just an irritant to the cognoscenti, but if you get too much it can degrade the image. Many people set the ISO rather than leave it on automatic and don't raise it unless they have to.

It is rare to use over 1/2000. If you set your aperture for the widest opening to blur the background and you are in the snow on a sunny day you might need more. Most prosumer cameras with f2.8 lenses can't generate 1/2000 except under really unusual conditions. DSLRs with better apertures can though.
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Old Jun 20, 2004, 6:03 PM   #3
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For shutter speeds over 1/2000 sec.:

Freezing action shots that are extremely fast (car racing, etc.)

Setting a higher ISO (800, 1600) purposely fora grainy lookwhile shooting in very bright conditions.
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