Reducing digital noise with appropriate ISO setting

ISO is a setting that determines how sensitive the digital camera is to light. The lower the ISO setting (for example, 50 or 100), the longer it takes for the light to be recorded and, even more importantly, there will be less digital noise (similar to a film's grain). The higher the ISO setting (for example, 400 or 800), the quicker the light gets recorded and the more digital noise you will find in the resulting photos.

The benefit of using a higher ISO setting is that it allows you to get a properly exposed photo in a low-light-level scene. Assuming you want to minimize digital noise, you may want to look at ways to add more light instead of changing the ISO setting or, maybe not even take the photo at all. You can often use a lower ISO setting if you use a camera support as the extra support, which will allow you to shoot with a slower shutter speed and still avoid image blur due to camera shake.

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