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.