Manufacturer description: The new Vario-Tessar T* FE 16-35mm F4 ZA OSS wide-angle zoom lens features an uncompromising optical design with five aspherical lens elements, including one large AA (advanced aspherical) element and three ED glass elements. This ensures outstanding corner-to-corner resolution and sharpness, while reducing distortion and minimizing color aberration. The lens features T* coating on its optical surfaces which minimizes flare and ghosting and boosts contrast, clarity and depth with landscape shots and strongly backlit scenes. It also has a constant F4 maximum aperture, allowing photographers to achieve beautiful background defocus effects with a shallow depth of field at all focal lengths. The lens is equipped with Optical SteadyShot image stabilization and is dust and moisture resistant.