This Fujinon XT17sx45BRMK1 17x 4.5mm HD ENG Lens was designed specifically for JVC’s ProHD line of ENG 1/3″ camcorders, such as the GY-HM700. Bringing new, higher-end performance features to an entry level ENG zoom lens, the XT17sx45BRMK1 offers an enhanced wide angle zoom range of 4.5-77mm, plus the Quick Zoom and Cruising Zoom functions previously found only in higher-end models. Known for their high build quality and precision optics, Fujinon lenses have become the industry standard for professional video applications all over the world.