Items included: Sigma TC-1401 1.4x Teleconverter for Canon EF, Lens Cap, Rear Lens Cap, Soft Carrying Case, Full Cleaning Kit, Lens Cap Keeper, Lens Pouch. Extended Focal Length: Increases focal length by 1.4x for select Sigma Global Vision lenses, enhancing reach for telephoto shots.. Autofocus Support: Maintains autofocus functionality with compatible lenses at up to f/8, ensuring accurate focusing.. Special Low Dispersion Element: Reduces chromatic aberrations for improved image quality and clarity.. Robust Construction: Dust and splashproof design for reliable performance in various conditions.