The Fujinon HTs18x4.2BMD-DSD 1/3" HD Lens for Video Conferencing, Motor Drive Only is a fully remote controlled lens that requires use of an available control box for focus, zoom, and iris. The lens covers the 1/3" sensor format and features an 18x optical zoom lens with a zoom range of 4.2 to 76mm without a lens extender. The lens features Inner Focus for a constant lens volume throughout the focus range.