INCLUDED - Sigma 17-40mm f/1.8 DC Art Lens for Canon RF, 67mm Filter Kit, PC Software Kit, Cap Keeper, and Cleaning Kit. SUPERIOR IMAGE QUALITY - Experience exceptional clarity and detail with 17 elements in 11 groups, including 4 SLD and 4 aspherical elements. VERSATILE FOCAL LENGTH - Capture stunning wide-angle to standard shots with a flexible 17-40mm zoom, perfect for diverse photographic needs. EXCELLENT LOW-LIGHT PERFORMANCE - Achieve brilliant results in challenging lighting conditions with a wide f/1.8 maximum aperture.