The Sightmark Solitude 8x42 binocular features fully multi-coated lenses, which provides maximum light transmission and optimal brightness, so any outdoorsman or sports aficionado can explore and enjoy his or her surroundings to the fullest extent. Featuring Bak-4 roof prisms, the Solitude 8x42 binocular is equipped with superior glass for a clearer and better quality image. The Bak-4 roof prism system features a straight through light system, which achieves better light transmission and allows for a more compact design. From early dawn to late dusk, the optimum color fidelity and clarity of image enhances any viewing experience, while a generously long eye relief provides comfortable viewing. The twist up eye cups on the Sightmark Solitude 8x42 binocular provides a custom fit and helps correct eye relief, even for individuals who wear eye glasses. The Sightmark Solitude 8x42 binocular boasts a rugged, yet lightweight, rubber armored body that is nitrogen filled and O-ring sealed, making it waterproof and fog proof. Featuring dust proof construction, the Sightmark Solitude 8x42 binocular is highly durable for a lifetime of use.