Kenko Binoculars Artos 10x42 Waterproof 10x magnification 42mm objective lens Pore prism Binocular Fully Multi-coated Lenses for maximum light transmission and brightness Bak4 Porro Prisms Fully waterproof (JIS Class 6) construction High Eyepoint design provides longer eye relief with or without eyeglasses Lead and arsenic free glass (Eco-glass)