The Ultimaxx 420-800mm f/8.3-16 Super HD Manual Telephoto Zoom T-Mount Lens (Black) is perfect for professional and amateur photographers alike. It is an extremely powerful manual telephoto lens featuring a push/pull zoom system with integrated lock which offers increased accuracy by allowing for precise setting of the zoom level while helping to prevent accidental adjustments after your setup is established. There is a built-in, rotating tripod mount for easily attaching this lens to any standard thread (1/4-20) tripod or monopod making this a great lens for landscapes. This lens is also perfect for the wildlife or nature photographers who want to be hidden while taking photos of their subject due to its multi-coated optics which allow for superb shots in a wide variety of conditions and its extensive zoom capabilities.