The Rokinon 500mm f/6.3 Multi-Coated ED Mirror Lens is incredibly powerful. This lens is designed and constructed with ED Glass for enhanced dispersion. It's an excellent addition to any photographer's collection. This 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 aberration. With its tremendous power, this lens is ideally suited for wildlife and sports photography. Multi-coated high definition optics and an integrated lens hood combine to maintain maximum contrast with reduced glare and reflections. It produces sharper, more intense pictures. Take incredibly close shots from long range distances. While this lens is designed for high definition telephoto photography, it is also one of the most affordable precision optics available, which allows anyone on any budget to enjoy shooting crisp, clear pictures.