The new Monarch Hg was built from the ground up to achieve class-ruling optical performance, unrivaled ruggedness and exceptional handling. From eyecups to objective lenses, the new patriarch of the flagship Monarch family pushes binocular performance to higher levels through design, technology and 20 years of Monarch Atb-building experience.Building the Ultimate All Terrain BinocularEvery precious moment you spend in the field deserves the advantage of extraordinary performance. To this end, Nikon engineered the optical system of Monarch Hg around its Ed (Extra-low Dispersion) glass and high-quality multilayer coating that is applied to all lenses and prisms for brighter, higher resolution viewing.Nikon's Field Flattener Lens SystemWorks in conjunction with Monarch Hg's extraordinarily wide field of view -8.3 Degree and 6.9 Degree respectively in the 8x42 and 10x42 models-to provide a sharp, clear view to the lens periphery.Stronger. Lighter. More Agile.