Pentax SP 10x50 WP BinocularsPentax SP 10x50 WP Binoculars Large objective lenses in this line up offer outstanding, light gathering capability. Clear high contrast images even at twilight or in other low light conditions make these models suitable for even astronomical observation. Coatings protect lens surfaces from water and oil The PENTAX original coating repels dust, water, and grease to keep your optics clean and your image quality at its peak. Nitrogen filled waterproof