The Argos G2 842 HD 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 the 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 chassis reduces weight taking strain off of your neck but makes it strong enough for the harshest environments.