This Bundle Includes Sigma 14-24mm f/2.8 DG HSM Art Lens for Canon EF, With Cleaning Kit, Cap Keeper, Lens Pouch, Canon Mount Adapter EF-EOS R. Wide-Angle Zoom: 14-24mm focal length with a constant f/2.8 maximum aperture, ideal for low-light and creative applications like landscape and architectural photography.. Advanced Optics: Three SLD and three FLD elements, along with three aspherical elements, reduce chromatic and spherical aberrations for sharper, clearer images.. Quick & Quiet Autofocus: The integrated Hyper Sonic Motor (HSM) delivers fast and smooth autofocus with full-time manual focus control for precise adjustments.. Durable Build: Constructed from a thermally stable composite with a brass bayonet mount, ensuring long-term durability, and water- and oil-repellent coatings for better protection in harsh conditions.