The Sony Vario-Tessar T* FE 16-35mm f/4 ZA OSS Lens will satisfy nearly all the wide-angle needs of full-frame E-mount shooters. It also features a constant f/4 aperture for consistent performance and illumination throughout the zoom range. Ensuring optimal image quality, the lens design incorporates five aspherical elements, including one Advanced Aspherical (AA), three extra-low dispersion elements, and the Zeiss T* anti-reflective coating. This combination delivers images that are free from aberrations and flare.For smooth operation, the lens uses a linear autofocus motor and an internal focusing design. Also, it is equipped with Optical SteadyShot to dramatically reduce the effects of camera shake on your images. Additionally, it has a seven-blade circular diaphragm for smooth, rounded bokeh.Based on the Zeiss Tessar optical concept, this lens uses a design with 12 elements in ten groups that helps ensure a smaller overall lens size along with reduced flaring, distortion, and chromatic aberrations.Covering ultra-wide to wide-angle perspectives, this compact 16-35mm will pair nicely with Sony's full-frame E-mount cameras. It can also be used on APS-C format cameras where it will provide a 24-52.5mm equivalent zoom range.