Super wide-angle zoom with revolutionary optical design. This exceptional, Professional lens is equipped with a nanocrystalline coating. This reduces phantom images and light reflexes and Provides sharpness over the entire image range that can even surpass that of lenses with comparable fixed focal lengths. < font color= "#ffff00" > -==- Proudly presents The nanocrystalline coating reduces phantom images and light reflections. Silent wave motor (SWM) for fast and very quiet focusing.ED glass lenses minimize chromatic aberration. Bayonet connection sealed with rubber. Manual focus is possible at any time (switching between M/A and M).