Oshiro 500mm f/6.3 LD UNC AL Super Telephoto Lens for Samsung Galaxy NX, NX1, NX3000, NX2000, NX500, NX300, NX210, NX30 and other NX Mount Mirrorless Digital 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