Usually, you’ll have to take a couple hundred thousand photos before this happens though, and Canon has allegedly released a particular shutter actuation threshold to indicate the number of shots expected for each EOS model before the shutter fails. At this point, you may either need to have the shutter replaced or purchase a new camera. Sooner or later, your DSLR’s shutter will wear, slow down and eventually stop functioning. Just as with any piece of mechanical equipment, a camera has a lifetime that is based on the number of shutter actuations otherwise known as shutter clicks or the shutter count. Shutter Count Number is important – A DSLR’s shutter will eventually fail