The Weems Classic 7x50 binoculars are built to exceed military specifications with excellent lowlight capabilities and high resolution. These seaworthy companions are found on military and commercial ships, and pleasure boats alike. They are fitted with Porro prisms for superior optical performance. The glass type used is BAK4, a barium crown glass with high density that eliminates internal light scattering and produces sharper images than other glass types. All air-to-glass lens surfaces have received multiple chemical coatings giving the best light transmission and brightest images.