The Sigma 15mm F1.4 DG DN Diagonal Fisheye | Art Lens is built for photographers and content creators who want to capture the world from a bold, ultra-wide perspective. Designed for full-frame mirrorless cameras, this premium lens combines a dramatic 180° angle of view with a fast F1.4 maximum aperture for impressive creative results. Its advanced optical design features 21 elements in 15 groups, including specialized low-dispersion and aspherical elements to help deliver high resolution and control optical aberrations. The bright aperture makes it particularly useful for astrophotography and night-sky photography, while the distinctive fisheye perspective creates eye-catching landscapes, architectural compositions, and artistic images. The lens also features responsive, quiet autofocus, a manual focus lock switch, an aperture ring with a de-click function, and a dust- and splash-resistant structure. A rear filter holder and lens heater retainer provide additional convenience for specialist photography in challenging environments. Compatible with Sony E-mount and L-mount full-frame mirrorless cameras, the Sigma 15mm F1.4 DG DN Diagonal Fisheye | Art is an excellent creative tool for professionals and enthusiasts seeking distinctive ultra-wide imagery.