Konus Konusrex 10x50 BinocularsThe Konus Konusrex 10x50 Binoculars are some of their best binoculars, equipped with some of their highest quality optical glass. The Silver Mirror coating gives a brilliant light transmission of up to 98%, creating vivid, high contrast images. The BaK 4 prisms are phase corrected to give the sharpest possible picture, and the fully multi coated lenses prevent excessive light reflection that lessens image quality. All of these components are protected