Oshiro 500mm f/6.3 LD UNC AL Super Telephoto Lens for Sony a7r, a7s, a7, a6300, a6000, a5100, a5000, a3000, NEX-7, NEX-6, NEX-5T, NEX-5N, NEX-5R, 3N and Other E-Mount Digital Mirrorless Cameras 500mm f/6.3 achromatic refractor telephoto lens Extra-low dispersion element is incorporated within the 4 element, 4 group design, and helps to reduce chromatic aberrations for sharper image quality Manual focus design is complemented by both depth of field and distance scales for utilizing pre-focusing techniques Built-in tripod mount and removable lens hood helps reduce stray light to prevent lens flare and ghosting All-metal body and mount