Kowa Prominar XD LensesKowa's XD Lenses (eXtra-low) dispersion glass with similar characteristics to fluorite crystal) combines with a special dispersion concave lens to reduce a very high percentage of chromatic aberration for the ultimate viewing experience.Schmidt-Pechan Roof Prism Lens and C3 CoatingKowa's roof prism binoculars use a Schmidt-Pechan prism. With the highly reflective C3 coating application, this increases reflectivity by 99% or higher reflectance rate across the entire visible spectrum (400-700 nm). This not only provides bright and sharp images, but also accurate colour reproduction.Thixomolded Magnesium Alloy BodyA magnesium alloy body is formed using a sophisticated thixomolding technology to deliver the benefits of a high strength metal body but in a lightweight magnesium alloy structure. The durability and reliability of these binoculars can withstand the most severe conditions to provide users the greatest degree of confidence and security.Kowa's KR CoatingKowa's KR coating protects the lenses from dirt and other foreign residues that may affix to the lenses during normal use. Fingerprints or oil can easily be removed with the proper lens cleaning techniques.All-Surface Multi-CoatingThe all-surface multi-coated optical system provides a precise colour definition for a brighter and sharper image.Waterproof and FogproofThe housing is waterproof to JIS Protection Class 7 and filled with dry nitrogen gas to prevent internal fogging to ensure image clarity.Twist-Up EyecupsTwist-up multi-step eyecups allow customization for easy viewing even when wearing eyeglasses.Specs:- Magnification: 8x- Objective Lens Effective Diameter: 42mm- Minimum Focusing Distance: 5.9ft / 1.79m- Real Field of View: 8.2- Eye Relief: 17mm- Field of View at 1000 ft/yds: 429 ft- Dimensions: 13.97cm x 12.7cm x 5.08cm- Weight: 638g