G-series optical design ideal for HD and 4K moviemaking, Minimized angle of view variation (breathing) while focusing, No focus shifting or axial displacement while zooming, Independent zoom, focus and iris rings for superior control, Constant F4 max aperture maintains exposure / depth of field, Super sonic wave motor drive for quiet variable speed zoom, Silent iris and linear AF drive system for quiet operation, Dust and moisture resistant design for maximum durability, Optical SteadyShot image stabilization for video and stills, Ideal for full-frame, APS-C and super 35 e-mount cameras,

This top-quality powered zoom lens for 35mm full-frame format cameras has been created to satisfy professional moviemaking requirements, including the high resolution HD and 4K formats. Focus breathing and zoom image shift have been reduced to an absolute minimum, while aspherical elements and advanced multi-coating technology effectively suppress aberration. An SSM (Super Sonic wave Motor) drive system has been employed for precise, quiet zooming. Independent control rings for zoom, focus, and iris (aperture) are provided for the first time in an α lens. Built-in optical SteadyShot image stabilization adds to the extraordinary performance of this outstanding lens.