ISO sensitivity is a value that determines how sensitive the camera's image sensor is to light. The minimum ISO sensitivity parameter indicates the lowest possible value that can be set on the camera. Lower ISO values mean less sensitivity to light, resulting in a clearer image with less digital "noise". Noise is a visual distortion that shows up as graininess or spots of color in the image. The lowest ISO value is primarily used when shooting or photographing in good lighting conditions, such as on a sunny day, when there is enough light available to properly expose the image without having to artificially increase the sensitivity of the sensor.
