The Fujinon XA20sx8.5BERM-K3 ENG Lens is a 8.5-170mm lens, designed to provide 2/3" format cameras with a wide to super telephoto angle-of-view. The lens has a 20x zoom ratio and a 2x extender effectively doubles the focal range. An ergonomic, digital servo zoom control is also included.Internal focusing minimizes the effects of lens breathing, which ensures a more consistent focal length when adjusting focus. Fujinon's QuickZoom technology improves zoom speed to 0.7 seconds end to end. With the push of a button, QuickZoom facilitates a rapid shift to the telephoto end to check focus. Releasing the button automatically returns the lens to the previously selected focal length.