The Athlon Optics Argos G2 12x50 HD 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 Athlons own Enhanced Spectral Prism (ESP) Dielectric coatings. This prism system reflects over 99% of the light into the users eyes for a bright picture with accurate color reproduction. Features of the Argos G2 12x50 HD Binoculars: ESP Dielectric Coating Lightweight Magnesium ChassisXPL Coating for dirt, scratch and oil protectionPhase Corrected PrismsBaK4 Prisms Advanced Fully Multi-Coated LensesLong Eye Relief (16mm) Close focus Twist up EyecupsWaterproof Argon Purging Athlon Argos G2 12x50mm HD Binoculars 114007