Rubber-armored, fogproof and waterproof, the 10x25 Nature Monocular from Celestron is designed to withstand the rigors of outdoor use. This 10x, 25mm objective optic features BAK4 prisms and fully multi-coated lenses for a bright, crisp image. Its twist-up eyecup and 14mm eye relief gives users who wear eyeglasses full access to the entire 304' linear field of view. Pocket-sized and lightweight at 6 ounces, the Nature Monocular comes with a soft carrying case, strap, and lens cloth.