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.
1 For large sizes 55 and over, use six Shutter-Loks per shutter. 2  Can be used for installing vinyl shutter on any surface including: wood, aluminum, vinyl, stucco, hardboard, brick, or masonry. 3  Tools needed for installation: Electric drill, 1/4 drill bit, hammer. Install instructions install_shutter_lok.pdf NOTE: Used for Mid-America's Master Shutters and Mid-America Custom Vinyl, louvered and raised panel shutters.