The Nikon 10X42 Monarch Roof Prism Binocular are fully loaded roof prism binoculars at an incredibly attractive price. Nikon 10X42 Monarch Roof Prism Binocular has Eco-Glass(made without the use of arsenic or lead) is used for all lens and prism elements. Nikon 10X42 Monarch Roof Prism Binocular ATB prisms feature phase-correction and high reflection mirror coatings for superior sharpness and resolution. Nikon 10X42 Monarch Roof Prism Binocular is every air-to-glass surface received multiple anti-reflective coatings, resulting in a Nikon 10x42 Monarch with much improved brightness, resolution and edge-to-edge sharpness Nikon 10X42 Monarch Roof Prism Binocular features roof prism, got best optical design. Nikon 10X42 Monarch Roof Prism Binocular incorporates Nikon's exclusive Eco-Glass (made without the use of arsenic or lead) for all lens and prism elements. Prisms feature phase-correction coatings and high reflection