Nikon Prostaff 5 10x50 Binocularhe Nikon Prostaff 10x50 Binocular is a dependable, rugged optical device. Large 50mm objective lenses enhance viewing capability in lower light, lower contrast situations accompanying dawn and dusk. Durable Outstanding Brightness Nitrogen Filled Water and Fog proof One of the lightest binoculars in its class. Fully multilayer coated lenses ensure image brightness and a crisp, clear visual experience. Specifications: Magnification 10x Objective