Unknown. Help us by suggesting a value. (Nikon Coolpix S9300)
Unknown. Help us by suggesting a value. (Pentax K-r + smc Pentax DA L 18-55mm f/3.5-5.6 AL)
With a higher light sensitivity (ISO level), the sensor absorbs more light. This can be used to capture moving objects using a fast shutter speed, or to take images in low light without using a flash.
Maximum ISO: is this important to you?