NIKON EDGNikon’s next generation of EDG binocular delivers ruggedness and extraordinary images. Extra-low dispersion glass eliminates chromatic aberration or the dispersion that occurs when light rays of varying wavelengths pass through optical glass. Dielectric High-Reflective Multilayer Prism coatings ensure the brightest images even in the lowest light. Nikon ED glass produces brilliant, high-resolution images that are extremely bright, razor sharp and free of flare for unparalleled viewing in any conditions.A wealth of advanced technologies are integrated into each and every optical part of the EDG line, including a Field Flattener Lens System. This cutting-edge technology results in a higher light transmission rate and flatter characteristics across the entire visible light range. This means experiencing a crystal clear field of view and more natural color reproduction.The redesigned chassis features a short bridge style and additional rubber armour for an easy grip. Sure fitting rubber objective caps protect lenses while staying locked in place. A multi-function, central focusing knob provides precise focusing as well as diopter adjustments for unparalleled speed and convenience. Weight in the field is not an issue; the EDG’s magnesium-alloy body cuts weight without sacrificing durability. The EDG is waterproof and fogproof, O-ring sealed and dry nitrogen filled to handle the toughest conditions.The ergonomically contoured horn-shaped detachable eyecups block out peripheral light for a clear field of view. The EDG has long eye relief (8x32-18.5mm, 10x32-17.3mm, 7x42-22.1mm, 8x42-19.3mm and 10x42-18mm) that provides optimum view with or without eyewear.The Nikon EDG binoculars come with Nikon's unmatched 25-year "No Fault" warranty.