Opteka 500mm f/8 High Definition Telephoto Mirror 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
The Opteka manual focus mirror lens is incredibly compact and lightweight. Using an advanced reflex design, this is a mirror lens that is ideally suited for wildlife and sports photography. It has a fixed aperture of f8. It comes complete with a soft pouch and three (3) rear mounted, 30.5mm filters, (ND-2X, ND-4X & Skylight). Opteka mirror lenses incorporates advanced computer designed optics and the latest in multi-coating techniques. The process of multi-coating assures virtually flare free photographs even under adverse lighting conditions resulting in crisp high contrast pictures with full color fidelity.SpecificationsFilter Size:72mm front, 30.5mm rearf/Stop Range:f/8.0 (fixed)Minimum Focus Distance:5.6' (1.7 m)Magnification:1:3Angle of View:5Groups/Elements:6/7Length:3.4" (8.6 cm)Maximum Diameter:3.0" (7.6 cm)Weight:0.79 lb (360 g)Included Items~ Opteka 500mm f/8 Telephoto Mirror Lens~ 3 Filters (Skylight, Nd 2x, Nd 4x)~ T-Mount Lens Adapter~ Lens Caps~ Lens Pouch~ 10 Year Warranty