The zoom range is 420mm-800mm and the maximum aperture in the zoom range is f/8.3-16, which greatly expands the camera's perspective and allows the photographer to shoot professional shots from considerable distances. The lens optical properties eliminate glare and reduce aberrations, resulting in a clear and bright lens each time.Multilayer MC coating on optical glass. Suitable for shooting subjects that photographers cannot get close to (such as sports matches, wild animals, long-distance close-up, etc.) T2 mount supports adapter ring to for Canon, for SONY/ for Minolta, for Nikon, for Pentax, for Olympus and other DSLR cameras. Screw the lens onto the adapter ring and connect to the camera body when shooting. The camera dial is set to M manual mode, can change the exposure through shutter speed or ISO. Some camera can realize automatically expose, and use AV mode shooting depending on the camera's functions.