/> T-Mount to AF-Mount Adapter Ring: T mount lens with adapter ring, replacement for Sony A900/ A850/ A700/ A580/ A560/ A550/ A500/ A99/ A77 cameras. MF 2X Teleconverter Lens: Doubles the power of your lens to 1600mm, adopts high definition glass and well made with advance technique, the teleconverter can help to shoot clearer pictures of the distant scenery. Universal 1/4 Mounting: The base with 1/4 screw thread down the lens makes wide application on tripod and monopod, the base with ring can rotate, convenient to install in seconds. Specifications: --Telephoto Zoom Lens Material: Metal Mount: T mount(T2) Replacement for: Sony A900/ A850/ A700/ A580/ A560/ A550/ A500/ A99/ A77 Focal Length: 420-800mm zoom lens Aperture: f/8.3 #64;420mm-f/16 #64;800mm Optical Constructions: 4 elements in 2 groups Zoom System: Linear push-pull Exposure: Automatic exposure is available in Aperture Priority mode only for cameras with TTL metering systems; Other camera must be set in full manual Focusing: Manual helical(rotary) operation(Not AF compatible) Minimum Focusing Distance: 1.6 meters(5.25ft) from front lens element Filter Size: 62mm Diameter: 69mm Length: 24-35cm / 9.45-13.38in(with caps) Lens Dimension: 24 * 7 * 7cm / 9.45 * 2.76 * 2.76in --Teleconverter Lens Color: Black Material: Metal and glass Product Size: 5.5 * 5 * 5cm / 2.1 * 1.9 * 1.9inch Product Weight: 77g/ 2.7oz Package Size: 38 * 9.5 * 9.5cm / 14.96 * 3.74 * 3.74in Package Weight: 1200g / 42.33oz Packing List: 1 * Telephoto Zoom Lens(with Bag and Caps) 1 * UV Filter(with Storage Holder) 1 * CPL Filter(with Storage Holder) 1 * FLD Filter(with Storage Holder) 1 * Teleconverter Lens(with Bag and Caps) 1 * Adapter Ring 2 * Lens Cleaning Cloth