The Sony 500mm F8 Reflex SAL500F80 Mirror Lens is a telephoto lens compatible with Sony A-mount cameras. It has an autofocus feature and a maximum aperture of f/8. The lens has a focal length of 500mm and can be used for both auto and manual focus. It is a mirror lens. condition is very good. comes with carrying case, leather  front lens cap, back cap, and two drop in style filters. one clear and an ND 4 filter.