INCLUDED - Sigma 20mm f/1.4 DG DN Art Lens, Lens Hood, Front/Rear Caps, Case, Guide Plate, 4-Year Warranty, 82mm Filter Kit, VND Filter, Lens Cleaner, Cleaning Kit, and Lens Cap Tether. SUPERIOR OPTICAL PERFORMANCE - Achieve exceptional image quality with 17 elements in 15 groups, including FLD, SLD, and Aspherical glass, minimizing aberrations for stunning clarity. ULTRA-WIDE PERSPECTIVE - Capture expansive scenes with a 20mm focal length and a 94.5° angle of view (full-frame), perfect for landscapes, astrophotography, and immersive storytelling. BEAUTIFUL BOKEH - Create smooth, circular bokeh with an 11-blade rounded diaphragm, ideal for isolating subjects and achieving artistic background blur even at wider apertures.