The portable CJ25ex7.6B IASE S  4K UHD 25x telephoto zoom lens is a part of our 2/3-inch UHDxs series, combining outstanding optical performance and support for 4K UHD (and HDTV) broadcast production. Its compact size and light weight support the high mobility shooting often entailed in documentary and many other genres of television field production. The 25x zoom ratio supports a focal length range of 7.6-190mm (15.2-380mm with the built-in 2x extender), while maintaining 4K resolution across the entire focal range and 16:9 image plane. Lens design strategies have extended the optical dynamic range to meet contemporary HDR imaging requirements, and support the wider color gamut specified in the international standard ITU-R BT.2020. An advanced digital drive unit deploying 16-bit encoders is fully compatible with the zoom, focus and iris controllers used with established broadcast 2/3-inch HDTV cameras. Three 20-pin connectors on the drive unit interface with our ZDJ-S01 Zoom Demand and FDJ-S01 Focus Demand controllers, while providing a 16-bit interface to virtual systems. The unit empowers a variety of operational capabilities that are set up using the on-board display.