Items included: Sigma TC-1401 1.4x Teleconverter for Nikon F, Lens Cap, Rear Lens Cap, Soft Carrying Case, Full Cleaning Kit, Lens Cap Keeper, Lens Pouch. Increased Focal Length:Extends focal length by 1.4x for compatible Sigma Global Vision lenses, offering more reach for telephoto photography.. Autofocus Compatibility: Maintains autofocus functionality with a maximum aperture of up to f/8, ensuring efficient performance for high-speed shooting.. Special Low Dispersion Element: Reduces chromatic aberrations to preserve image quality and clarity.. Durable Design: Dust and splashproof construction ensures reliable use in challenging conditions.