Leupolds BX-1 Yosemite 8x30 Binoculars are perfect for the entire family because of a compact design and the ability to adjust to a narrow interpupillary distance. Rugged, waterproof construction with an armor coating stands up to your toughest adventures, while lead-free lenses with a fully multicoated lens system ensures exceptional optical clarity. Diopter focus and large center focus wheel makes it easy to focus so you can pick out antlers amongst the sage and trees. Phase coated to allow maximum light transmission. Porro-prism design with BAK-4 prisms. Nitrogen filled for waterproof and fogproof performance so you dont spend the golden hours frantically rubbing fogged-up lenses. Twist-up lens cups. Manufacturers limited lifetime warranty. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Full-Size.