Fully coated optics and BK7 prisms, Protective rubber covering, Ultra compact design with folding center bridge, Diopter adjustment for precise focusing, Water resistant body and nylon carrying case, 7 Degree angular field of view, 367" Linear FOV, 2, 6mm Exit pupil, 11mm Eye relief, 7" Near focus, Size: 8 x 21, SKU: LBMT7577