Nikon action ex 7x50 binoculars the newest atb offering from nikon is modeled from the best selling action series roof prism binocular like all atbs the action ex is nitrogen filled and o ring sealed for years of waterproof fogproof and shockproof performance a truly extreme and rugged binocular the action ex is built on an all metal chassis with all optical components installed in a lightweight polycarbonate shell the eco glass lens system provides bright and tremendously clear images