SIGMA 28-45mm F1.8 Maximum Aperture DG DN Art Lens with Internal Zoom and HLA Autofocus (L Mount)The SIGMA 28 45mm F1. 8 DG DN Art Lens was developed as a full frame successor to the SIGMA 18 35mm F1. 8 DC HSM Art (for APS C DSLR cameras), which in 2013 became the first lens in the world to achieve F1. 8 throughout the entire zoom range. While offering the convenience of a zoom, this new lens does not compromise on optical performance. By effectively arranging 3 aspherical lens elements and 5 SLD glass elements, this lens suppresses various