The Fujinon 9.5-525mm f/1.7-2.9 2/3″ Bayonet EFP Box Lens is a high zoom ratio lens that lends itself to covering sporting events and other large-scale productions. Its 55x zoom range can extend from normal to super-telephoto focal lengths. The 2x Extender doubles your focal length to achieve tighter framing on your subject. The box housing is specially designed to prevent fogging of the lens elements during changes in temperature or humidity allowing the lens to be used outdoors in inclement weather conditions. In addition to being weather sealed, this lens is secured against dust and other small particles that might harm the lens. Since the lens incorporates Fujinon’s DigiPower Digital Servo technology, it can provide precise, repeatable digital control from studio paint boxes, PC’s, and traditional analog controls. Digipower also permits setting custom speeds for zoom and focus, zoom limiting, and other servo parameters. Diagnostics and advanced controls can also be accessed via an RS-232 port.