Opteka 500-1000mm f/8 HD Telephoto Mirror Lens with 72" Monopod, 2x Doubler, T-Mount Adapter, 10pcs Cleaning Kit for Canon EOS-M Mount M100, M10, M6, M5, M3 Compact Digital Mirrorless Cameras ADVANCED OPTICS: Featuring an optimized design, this lens uses mirrors and a series of 9 optical glass elements in 8 groups to reduce chromatic and spherical aberrations. A anti-reflective coating suppresses lens flare and ghosting for increased contrast and color fidelity. SUPER ZOOM: Manual focus 500mm or 1000mm with the 2x converter, this lens is not only a superb long range choice, but also performs well in a variety of scenes from sports and surveillance to everyday shooting. SOLID CONSTRUCTION: Full metal body and rear mount allow this lens to withstand wear and tear much better than plastic lenses while commanding a rugged, solid feel when using. COMPACT AND LIGHTWEIGHT: Mirrors allows this lens to be much shorter than it would need to be without the mirrors. At 3.4-inches long, this 500mm lens is one of the shortest telephoto lenses. BOX INCLUDES: Opteka 500mm f/8 HD Telephoto Mirror Lens, 2x Doubler for Opteka T-Mount Lenses, Tmount for Canon EOS, C3 Remote Shutter Release Cord for Digital SLR Cameras (36" Cord), 72" Monopod with Quick Release, Deluxe 10 Piece Camera Care Cleaning Kit, 47th Street Photo Microfiber Cleaning Cloth.