The High-Power 800mm f/8.0 Super Telephoto Lens is a manual focus mirror T-mount lens that is designed to work with full frame cameras and most digital SLR camera models, including Canon, Minolta, Nikon, Pentax, Samsung, and Sony. Its compact size provides superior lightweight handling and maximizes storage convenience. For best results, use with monopod, tripod or chest supports to alleviate shake. It has a minimum focus distance of 11.5 feet and a 3 degree angle of view. It has a 105mm front and 30.5mm rear thread.