The new lens control for JVC GY-HM 600 and GY-HM 650 unit offers the finest degree of control and a complete feature set. With its wide-sweep zoom rocker, the VZ-Rock-J600 combines the attributes of broadcast controls with a compact, affordable design. VariZoom is the world's largest manufacturer of lens controls with the widest variety of controls offered anywhere. Our controls are used by CNN, CSPAN, National Geographic Society, Nickelodeon and many other professionals. Get a VariZoom on your handle, you'll be glad you did!