Shutter Counter is a tool that lets you count your Canon EOS DSLR cameras’ shutter counter values. Unfortunately, Canon doesn’t provide you with these values. This tool works with Canon cameras that have the DIGIC III and subsequent processors. There are several reasons why you may want to know shutter counter value. It lets you confirm if a camera is new. Zero shutter count means an unused camera. It also helps establish a used camera’s value. The lower the shutter count, the higher the value.