This lens is a Tele-Astranar with a focal length of 400mm and a maximum aperture of f/6.3. It is a manual focus lens with a screw mount, manufactured in Japan. The lens is suitable for use in telephoto photography and is compatible with various camera models. It is a great addition to any photographer's collection, offering sharp and clear images with minimal distortion. Buy this lens today to capture stunning long-range shots.