Here's how: 1  Stand with your feet shoulder-width apart and knees bent slightly. 2  Lean forward, placing your hands just above your knees. 3  Round your back so that your chest is closed and your shoulders are curved forward.  Then arch your back so that your chest opens and your shoulders roll 1  back. Repeat several times.
Typically this count is between 100,000 and 300,000 shutter actuations, with the latter limit associated with the EOS-1D models. In fact, the Camera Shutter Life Expectancy Database is a really neat user-based site for DSLR models of several brands, including Canon.
Required for Installation: Electric drill, Â¼ drill bit, ï¤âï drill bit, hammer, and. shutter fasteners. (Â¼ carbide drill bit is required for stucco, hardboard, ï¬ber cement, brick or masonry.) For shutters up to 55, use four shutter fasteners. per shutter. For shutters 55 and over, use six.