"Debuting the world's first 1.8 wide-angle lens, the 14mm F1.8 Art incorporates the same groundbreaking aspherical element as Sigma's critically acclaimed 12-24mm F4 Art. Boasting outstanding image quality from center to edge, the 14mm F1.8 Art features the largest glass mold (80mm) in the industry, offering photographers an ultra-wide prime with virtually no distortion, flare or ghosting. Three lens elements are made with FLD (""F"" Low Dispersion) glass, which is equivalent to calcium fluorite in performance, and four SLD (Special Low Dispersion) glass elements, which reduce chromatic aberration. In addition to the great IQ from edge to edge, the new 14mm F1.8 offers a superfast and efficient AF system. With a minimum focus distance of 10.6 inches at 14mm, photographers can compose incredible close-up shots with expansive backgrounds.|Full Frame Lens with APS-C compatibility|Worlds first Full Frame 14mm 1.8|Ideal Use: Landscape Photography, Astrophotography, Documentary and Architecture|4 Year USA Warranty"