Light sen­si­tiv­ity and noise

Amateur Photographer - - Technique Take Control Of Iso -

1ISO is the con­trol that al­lows you to set the sen­si­tiv­ity of the cam­era sen­sor to light. Lower set­tings make the sen­sor less sen­si­tive to light, while in­creas­ing the ISO makes the sen­sor more sen­si­tive to light. So as a rough guide, this means that lower set­tings can be used in bright con­di­tions or when you have a tri­pod to sup­port the cam­era. Higher set­tings are al­most al­ways used to achieve a shut­ter speed that’s fast enough to al­low the pho­tog­ra­pher to hand­hold the cam­era in low light, or to freeze a mov­ing sub­ject with a fast shut­ter speed. How­ever, the down­side is that as you in­crease ISO, more noise is in­tro­duced to the im­age, which ul­ti­mately di­min­ishes im­age qual­ity.

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