- The Camera - "ISO & Gain" What is ISO? It is a setting on a camera that allows you to change an image to brighten or darken. What is the visual difference between low and high ISO? Low ISO photos will result in less grainy (noise) photos, whilst higher ISO will result in more grainy photos. Higher ISO, however, can also add more brightness to the photo. When do you use a lower ISO? When do you use a higher ISO? Lower ISO may be used in a setting that is already bright, whilst higher ISO may be used if there isn't another way to increase the brightness (such as when using high shutter speed). This allows for less motion blur to appear on images when trying to take a picture of a fast-moving subject. High V. Low ISO Internet Examples Room Experimentation The darker room image looks a lot more grainy with noise, while the lighter room image looks a lot more clear. What is gain? It boosts video signal on a camera, allowing for more brightness by "fooling th...
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