Laowa 12mm F2.8 Zero-D Lens (SONY A). Ultra wide angle, manual focus lens with close to zero distortion. Superior optics provide crystal sharp images. Full frame compatible lens featuring 16 elements in 10 groups with a 7 blade aperture* and a minimum focus distance of just 18cms. All metal alloy construction housing multi-coated glass elements throughout. At a focal length of 12mm this lens is perfect for a wide range of subjects from astro photography to landscapes to architecture. Suitable for various mounts including Sony A. Accepts filters with additional filter adapter.