ISO allows you to adjust the camera’s sensitivity to light. Let’s help you find out more about ISO. What is ISO? ISO is sort of like volume control for listening to music. If there’s not much signal — in this case, light — you crank up your camera’s sensitivity. Film was rated by ISO, too. […] ISO allows you to adjust the camera’s sensitivity to light. Let’s help you find out more about ISO. What is ISO? ISO is sort of like volume control for listening to music. If there’s not much signal — in this case, light — you crank up your camera’s sensitivity. Film was rated by ISO, too. … Read More