Celestron Nature 8x30 - Porro Binocular (Black) 30mm, 8xmagnification, Fully multi-coated optics, Waterproof and fog proof Precision BAK-4 prisms, Twist-up eyecups. Rugged aluminum main body, Rubber covered body protects the optics 8x30 - Porro Fully multi-coated Optics, Waterproof and fogproof Precision BAK-4 prisms Twist-up eyecups, Rugged aluminum main body Rubber covered body protects the optics