The Fujinon ZK12x25 Cine Lens, with its industry-leading 12x zoom ratio to cover the most frequently-used zoom range of 25mm wide angle to 300mm telephoto, as well as advanced 4K optical performance support, delivers premium image quality across a versatile array of shooting scenes. It also supports an optional detachable servo drive unit (the ESM-15A-SA, sold separately) for electric zooming, focusing and iris. Mounting the drive unit enables the remote control of zooming, focusing and iris adjustment. Available Zoom Rate and Focus Position Demand controls gives this lens the operability equivalent to conventional TV camera lenses.