10x magnification & 42mm objective lenses, these Crossfire HD binos are optimized with select glass elements to deliver exceptional resolution, cut chromatic aberration and provide outstanding color fidelity, edge-to-edge sharpness and light transmission.Fully multi-coated lenses increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. Roof prism design is valued for greater durability and a more compact size.Adjustable eyecups twist up and down for comfortable viewing with or without eyeglasses. Center focus wheel adjusts the focus of both binocular barrels at the same time. Diopter (located on right eyepiece) adjusts for differences in a user's eyes.Rubber armor provides a secure, non-slip grip, and durable external protection. Binoculars are tripod adaptable allowing use on a tripod or car window mount.Nitrogen purging and O-ring seals provide water and fogproof performance in all environments. Rugged construction withstands recoil and impact.