The Tamron SP A011 is an ultra-telephoto zoom lens for Nikon DSLR with a maximum aperture of f/5-6.3. Integrated with vibration compensation and background blur effects, it provides a wide focal length range from 150 mm to 600 mm. This 4x zoom lens comes with a three-coil system for sharper and more detailed images. Enclosed in a compact body of 105.6 x 257.8 mm, the lens weighs 1951 g.