The Athlon Optics Argos G2 10x42 UHD Binoculars utilize a light weight magnesium alloy chassis and an ergonomic grips, allowing for comfortable, one handed operation. They come equipped BaK-4 prisms that been given Athlon’s own Enhanced Spectral Prism (ESP) Dielectric coatings. This prism system reflects over 99% of the light into the user’s eyes for a bright picture with accurate color reproduction. Features of the Argos G2 10x42 UHD Binoculars: UHD Extra-Low Dispersion Glass Lightweight Magnesium ChassisXPL Coating for dirt, scratch and oil protectionPhase Corrected PrismsBaK4 Prisms Advanced Fully Multi-Coated LensesLong Eye Relief (16.1mm) Close focus Twist up EyecupsWaterproof Argon Purging Athlon Scopes Athlon Argos G2 10x42mm UHD Binoculars 114011