Sigma AF 20mm F2 DG Contemporary Lens - Black - Sony E Mount (p/n 49B965) Dynamism in the palm of your handExceptional optical performance and superb build quality give photographers the joy of creating images introducing the new ultra-wide Sigma 20mm F2 DG ContemporaryThis all-new full-frame premium compact prime for mirrorless systems is the latest addition to Sigmas I series lineup combining a bright maximum aperture of F2 an ultra-wide 20mm focal length and stunning optical performance. The lens boasts an exceptionally small form factor weighing in at just 370g and measuring just 72.4mm in length* which makes it a highly practical optic that is portable enough for everyday shooting. Its ideal for landscapes wide-angle portraits weddings and interiors and is particularly well-suited to astrophotography owing to its very well-controlled sagittal coma flare. It is the fourth I series lens with an F2 aperture joining a 24mm 35mm and 65mm which together make a well-matched lens set for L-Mount and Sony E-mount users.Remarkably the 20mm F2 DG Contemporary is almost identical in size and weight to the very compact Sigma 24mm F2 I series. A sleek all metal design with a signature I series magnetic lens cap a manual aperture ring and exceptional production quality means using this lens is a highly intuitive and satisfying experience making the photo-taking process even more enjoyable. This sharp and beautifully built I series prime the Sigma 20mm F2 DG Contemporary captures the essence of the I series bringing a new level of user experiencethe pleasure of owning and using a lens.