New multi-layer lens coating and lens design reduce flare and ghosting. Extraordinary Low Dispersion (ELD) glass elements produce excellent image quality and ensure sharp, quality images for film and digital SLR cameras. It enables to see the far subjects in more detail than is possible with the naked eye. The HSM models (Sigma, Nikon and Canon mounts) provide high-speed, ultra-quiet AF function as well as full- time manual focus override. This digitally optimized ultra telephoto lens is equipped with a new multi-layer coating technology that reduces both flare and ghosting. This also ensures an accurate color balance and high definition results. This new lens also supplied with a 46mm gelatin filter holder at the rear, allowing the use of gelatin filters.