These award-winning binoculars have been made even better for 2007 with the addition of an HD objective lens element and new PlasmaCoat™ antireflective lens coatings. Phase coated prisms work with the lens system to eliminate diffraction and ensure peak clarity. Leupold's exclusive DiamondCoat™ an Index Matched Lens System® matches lens coatings to each lens for superior performance and optimal light management. DiamondCoat on exterior lens surfaces provides superior scratch resistance. Innovative interpupilary distance lock enables fast one-hand use. Comfortable, twist-up eyecups with long eye relief. Second Generation Argon/Krypton waterproofing is guaranteed for life. Made in USA.