Over several decades of manufacturing portable HD zoom lenses for ENG and EFP, Canon HD lenses have earned enthusiastic support from customers the world over, due to their excellent specifications, superb optical performance, and long-term reliability. Now, Canon has developed the portable CJ20ex7.8B 4K UHD lens, combining outstanding optical performance and support for 4K UHD (and HDTV) broadcast production. Featuring a focal length range of 7.8-156mm (15.6-213mm with the built-in 2x extender) and a 20x zoom ratio, the CJ20ex7.8B 4K UHD lens is able to maintain high 4K resolution and contrast from the center of the screen all the way to the edges. The resolution around the edges has been improved by achieving advances in the inner focus system In addition to the improvements in optical performance, the CJ20ex7.8B 4K UHD lens is compact and lightweight, provides a balanced center of gravity, and incorporates refinements that enhance operability Canon has brought together technology and knowledge accumulated over many years to create the CJ20ex7.8B 4K UHD lens portable telephoto zoom lens. Moving forward, Canon will continue refining its technology and developing even better products to enable customers to capture images of the very highest quality.