This digitally optimised ultra telephoto lens is equipped with a new multi-layer coating technology that reduces both flare & ghosting. This also ensures an accurate colour balance & high definition results. Incorporating two Extraordinary Low Dispersion glass elements to reduce chromatic aberration to a minimum & ensure sharp, quality images. The Internal Focus system ensures the overall length of the lens does not change during focusing, ensuring convenient handling & ease of use. The Hyper Sonic Motor (HSM) ensures an ultra-quiet, high-speed AF function as well as full-time manual focusing capability for Sigma, Canon, & Nikon mount lenses. A 46mm filter can be inserted near the rear of the lens, & a circular polarising filter can be used in situ. 800mm f/5.6 EX DG HSM Lens Hood Circular Polarising Filter Fitted Padded Case Front & Rear Caps Instruction Manual 1 Year Warranty Card 2 Year Extended UK Warranty Card