Vivitar 500mm "F/6.3" DX Telephoto Mirror Lens + 2x Teleconverter = 1000mm For Samsung NX Series NX, NX1, NX-5, NX5, NX-10, NX10, NX11, NX-11 NX-100, NX100, NX-200, NX200, NX-20, NX20, NX-30, NX30, NX-210 NX210, NX-200, NX200, NX-300, NX300, NX-1000, NX1000, NX-1100, NX1100, NX2000, NX-2000, NX2000B, NX3000, NX-3000, Galaxy NX, Compact Interchangeable Lens Digital Camera Ultra-telephoto range in a compact, lightweight form with advanced reflex design Super Spectra lens coatings provide even light transmission and minimize flaring The Vivitar 500 f/6.3 Mirror Tele Lens has a focal distance of 500mm and a good speed of 1:6.3. The sturdy metal housing and the high-quality workmanship and mechanics ensure a good image quality. The 500mm f/6.3 Telephoto Mirror Lens Vivitar is a telephoto lens in a lightweight, compact form. perfect for wildlife, nature, sports, and landscape photography. It comes complete with a 2x Teleconverter + T-Mount Ring + soft pouch