Designed to satisfy 4K production requirements, the Sony FE PZ 28-135mm f/4 G OSS Lens is a wide-ranging zoom lens that covers wide-angle to telephoto perspectives while adding many features for your full-frame, APS-C, or E-mount camcorder or still photography camera system. Focus breathing and zoom image shift have been reduced to an absolute minimum, while aspherical elements and advanced multi-coating technology effectively suppress aberration. Quiet operation is also a priority, so an SSM (Super Sonic wave Motor) drive system has been employed for precise, quiet zooming. Independent control rings for zoom, focus and iris using physical stops are provided for the first time into an E-Mount an lens. Focus noise is also minimized through weight reduction of the focus element group and use of a linear motor. Iris function is also designed to be smooth and silent for cinematography demands.