TAMRON AF70-300mm F/4-5.6 Di LD Macro Lens for Sony Type: Zoom Lens Focal Length: 70 - 300 mm Camera Mount: Sony Aperture: Maximum: f/4.0 - 5.6 Minimum: f/22 - 22 Compatibility: for Sony Diameter: 62 mm Focus Type: Auto Focus Lens Construction: 13 elements in 9 groups