The Cavision Standard Shoulder Pad Package with Viewfinder allows you to use your Canon 5D Mk II or other DSLR in a manner that approximates the shoulder-mounted style of traditional videography. Shoulder-mounted operation will increase your endurance and reduces the jitter of your shooting, for smooth operation over long days on set or on location. The follow focus comes with a 0.5 MOD drive gear. The addition of the viewfinder allows finer control over critical focus and scene framing. The aluminum follow focus device puts smooth control over your lens's focus ring in a position that's much easier to access than the lens barrel itself.