Vivitar 500mm f/8.0 Manuel Focus Telephoto Lens (White) + 2x Teleconverter = 1000mm for Sony Alpha Series SLT, A33, A35, A37, A55, A57, A57M, A57K, A58, A58, A58K, A65, A65V, A65VL, A77, A77, A77II, A99, A99V, A100, A200, A230, A290, A300, A330, A350, A380, A390, A450, A500, A560, A550, A580, A700, A850, A900 (A-Mount) Digital SLR Camera The 500mm f/8.0 Telephoto Lens from Vivitar is an ultra-telephoto lens that brings distant objects close and is ideal for wildlife photography. It is also used for landscapes, cityscapes, architecture, sports and celestial photography and multiple general photography applications. It's recommended to use with a tripod, The Built-in tripod mount provides stability when mounted tripod or monopod The lens multi-coating process provides even light transmission and minimizes flaring to produce sharp, high contrast images. The white lens barrel helps reduce heat buildup. Includes: Front Lens Cap / Rear Lens Cap / Padded Pouch with Shoulder Strap / T-Mount Ring / 2x Converter