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Iso and shutter speeds

trevor51590
03/08/04 12:49 AM GMT
What does each do to the picture?(ex. like what does a slower shutter speed or like a higher iso speed do?)
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Crusader
03/12/04 5:48 PM GMT
I'm still learning this stuff, so If I'm wrong bear with me ;)

The ISO setting adjust the sensitivity to light. EG a lower ISO setting will not be as sensitive to light and results in a picture with less noise. A higher ISO setting allows you to take pictures without the use of a flash in darker areas, but are more prone to noise (on digital camera's). Normally anything above 100 ISO is prone to noise.

The shutter speeds go hand in hand (to an extent) with the ISO setting. Shutter speed determines how much light is let through. Fast shutter speeds e.g. 1/2000 of a second, would be used to take action shots in bright settings to prevent motion blur. If you want to take pictures in the dark without a flash, a higher shutter speed is required to let enough light through (15s or so). You do however need to use a tripod for shots with slow shutter speeds.

Hope this helps!

*Edit* Just saw this was answered in another thread. LOL
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prismmagic
03/12/04 6:41 PM GMT
Iso is the films emulsion speed of the film or in the respect of a digital camera the ccd for example ISO 100 is the equivalent of 1/100th of a second is required f-5.6 for ISO 100 film as a standard d. Which in turn 1/200th second at f-5.6 will require ISO 200. and forward as the ISO increases.
Now the light absorption can be changed with the adjustment of either the ccd bracketing on the on in the lens otherwise the f-stop. The higher the f-stop the less light enters the camera and the lower the f-stop the more the light is captured. At higher F- stops you absorb less light and color or in the case of B&W the shadow is lower quality. At lower f-stop you gain more light, color and most of all less depth in the image, the image becomes rather flat. But this can be varied on the ISO used. A1/1000 ISO absorbs more light then A 1/100 ISO. Now here’s the trick! if you change the ISO setting to say 1/30 of a second and depending on what your capturing. You set the f-stop at a higher number you will absorb more light and increase color values, and most of which I think is the most important gain a much higher depth. Also as an example if you set your ISO say 1/60 And set your F-stop accordingly when you take a photo’ of say a stream running over rocks, it will then look like fog rolling over rocks. As crusader said you will need a try pod to do this in order to keep the image sharp.
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Clayton H. Bramlett
trevor51590
03/12/04 8:12 PM GMT
Thank you very much for the help people! it is much appreciated!
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::monkeypuzzle
03/13/04 2:52 AM GMT
thats sorted me out as well, thanx guys: )
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