Opteka 500mm f/8 High Definition Preset Telephoto Lens for Sony Alpha A99, A77, A65, A58, A57, A55, A37, A35, A33, A900, A700, A580, A560, A550, A390, A380, A330 and A290 Digital SLR Cameras HD, super multicoated glass optics with anti-reflection coating for the sharper images Manual focus, digitally-optimized telephoto zoom lens Gives you the equivalent of looking through a pair of 10x power binoculars, rotating tripod mounting mount 4 Elements in 4 groups May be combined with the Opteka 2X Multiplier for 1000mm Zoom (Sold separately - 47st Photo Item Code: B000JSZ41S)