7. ISO AND NOISE LEVELS
ISO IS THE foundation for exposure. Technically, it is a numerical representation of the speed at which your camera’s digital sensor accumulates light. For a good exposure, ISO typically has an impact on your choice of shutter speed. Your ISO setting also has a great impact on the level of noise in the photographic image.
Noise is a result of your sensor gaining up its ability to capture light. When you increase your ISO, the sensor struggles to fill in visual informational gaps as a result of being pushed to capture light more quickly. Out-of-place pixel coloration and blotchiness may occur, which interfere with the look ...
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