Designed for use in 4K UHD outside broadcast television production, the 4K UHD DIGISUPER 90 (UJ90x9B) broadcast lens features the world's highest zoom ratio (90x)* and combines a respectably wide 9mm setting with an impressive extreme telephoto setting of 810mm, the world's longest focal length*. The optical performance of the lens supports the many imaging parameters that collectively contribute to compellingly sharp 4K pictures. * Among compatible 2/3-inch 4K broadcast lenses available as of September 8th, 2015.