The VZ-Rock: The unique variable speed Rocker Zoom thumb control allows user to maintain the slowest crawl or gradually ramp up speed and then decrease speed gradually all in one smooth motion! Because your thumb never leaves the speed control you have quick response time and smooth actions to zoom in, zoom out, zoom faster or zoom slower. Simply push to the left of rocker to zoom out(wide) or to the right to zoom in (telephoto). No shaking the camera or time lost fumbling to find the right button to zoom in or zoom out. A low profile record button ("R") avoids accidental activation The intuitive rocker focus control provides you with smooth ergonomic control. Place your thumb in center of the rocker and move thumb forward to focus near or shift your thumb back to focus far. This is the only rocker control of it's kind that DOES NOT! share the rocker for both zoom and focus. Seperate controls for zoom and focus is essential for quick active response times.