The Nikon Monarch HG Binocular.
The Nikon Monarch HG 8x42 Binoculars feature ED (Extra-low Dispersion) glass for reduced chromatic aberration and high-quality multi-layered coatings on the lenses and prisms for improved resolution and light transmission for birding. The Monarch’s magnesium alloy chassis houses an optical system that provides 92 percent light transmission through fully multi-coated ED lenses, including field flatteners, scratch-resistant coating on the external lenses, and dielectric coated, phase-corrected BaK-4 prisms.
The Nikon Monarch Binoculars are waterproof and nitrogen-purged. The 8x42 model has a field of view of 435 feet at 1000 yards, and Nikon’s Field Flattener System reduces the curvature of the field of focus so that the extremely wide field of view is sharp all the way to the edge of your view while birding.
For more information about Nikon Monarch HG 8x42 Binoculars, see Optics4Birding at Nikon Monarch HG 10x42 Binoculars - Optics4Birding