Rokinon ED500M-B-AI 500mm F6.3 Mirror Lens for Nikon (Black)
The Rokinon 500mm f/6.3 Mirror Lens is a high-quality, computer designed product that incorporates the merits of both reflex optics and refraction optics. This combination provides the user with an extremely sharp picture with minimum color abberation. This Rokion mirror lens features a fast F6.3 aperture for much brighter images.