The Rokunor 500mm f/8 is a high quality super-telephoto catadioptric lens, being a mirror lens it is significantly lighter and smaller than a traditional lens of this magnification would be allowing for easier transportation. The catadioptric design also creates an interesting donut bokeh effect. This specific lens also features a T mount allowing you to attach an adapter and mount the lens to almost any camera system. It takes 77mm filters.

Box 21.