Nikon 8X42 Monarch ATB binocular are fully loaded roof prism binoculars at an incredibly attractive price. Nikon 8X42 Monarch ATB binocular has Eco-Glass(made without the use of arsenic or lead) is used for all lens and prism elements. Nikon 8X42 Monarch ATB binocular ATB prisms feature phase-correction and high reflection mirror coatings for superior sharpness and resolution. Another feature of Nikon 8X42 Monarch ATB binocular is every air-to-glass surface received multiple anti-reflective coatings, resulting in a Nikon 8x42 Monarch with much improved brightness, resolution and edge-to-edge sharpness