The Sigma 28mm f / 1.4 DG HSM is a time-tested optical engine. Thousands of experienced photographers around the world choose this particular model. New Sigma 28mm f/1.4 DG HSM is a wide-angle prime lens. Advanced optical system is compatible with Nikon's F-mount. This model features an advanced design that uses both low dispersion glass and aspherical elements. This manufacturer has done everything possible to reduce chromatic and spherical aberrations. Other technical advantages of new model include: This manufacturer chose 17 elements in 12 groups optical design Aperture range: f/1.4-f/16 Compatible with filters with a diameter of 77 mm Optical mechanism weight 865 g Compatible with cameras that support Full-Frame format Our Take on the Sigma 28mm f/1.4 DG HSM Art Lens for Nikon F: Sigma designers always create equipment to last. This is confirmed by expert reviews and reviews from our customers. The bayonet mount is made of brass for durability. This also applies to assembly components. A rubber seal is used in the mounting structure to ensure dust and splash resistance. This means people can work in any extreme environment without worrying about damage to the internal optics. This is one of the reasons for the use of this lens by sports journalists and tourists who dream of opening up new horizons. A super multi-layer coating to eliminate ghosting and flare, improve contrast and color accuracy are the main strengths of this model. People can use the new Sigma 28mm f/1.4 DG HSM for both video and still photography. In most cases, they will get crisp images with maximum detail