The 2B/GA 7x40 military-grade rangefinding binoculars are designed for distant observation in all weather conditions and in temperatures ranging from -40° to +140° F. Their bodies are protected from shock, abrasion and the elements by non-slip rubber sleeves. Their objective lenses are protected by two-piece polymer covers which are hinged and contain amber low-light filters. In twilight or hazy conditions, these filters conveniently snap over the ocular lenses to provide sharper contrast as well as a brigher view of the target. Other features include: Full multicoating and anti-reflection treatment eliminating glare and maximizing light transmission 6061-T6 alloy housing Waterproof Fogproof Oversized BaK4 prisms High resolution optic system Wide angle porro prism design Superior optical glass by Schott Glasswerk, Germany 7x Rangefinding Reticle Vertical bars are spaced 10 mils apart Center and outermost vertical bars are 5 mils high (18" at 100m) Medium sized vertical bars are 2.5 mils high (18" at 200m Small vertical bars are 1.25 mils high (18" at 400m) Bottom scale represents 24 inches in height at 200, 400, 600 and 800 m distances