Fujinon HA22X7.8ERD 7.8-172mm HD ENG-Style Telephoto Zoom Lens with 2x Extender HD standard lens for all high-definition broadcast news and field production applications in 16:9 image format Focal length of 7.8 to 172mm for 22x zoom ratio; contains servos for zoom and focus Rapid zoom movement to telephoto to check focus with the simple push of a button DigiPower servo control system contains QuickZoom, OneShot preset, AutoCruise, Zoom Mode Select, Zoom Speed Adjustment, and Zoom Limit Inner Focus technology to minimizes lens breathing