Athlon Optics Argos G2 Binoculars with Bak-4 Prism Glass and ESP Dielectric Lens CoatingThe Argos G2 binoculars has a secure, ergonomic, and comfortable one handed grip. They come with superior quality Advanced fully multi coated lenses for sharp contrast, true color, and excellent light gathering capabilities. They also have Bak 4 prism glass featuring our new ESP Dielectric coating and phase correction for color fidelity and sharpness. Argon gas purging makes the Argos binoculars waterproof and fog proof. A light weight magnesium alloy