Leupold Golden Ring binoculars already featured superb resolution, contrast, and color fidelity, thanks to exclusive Leupold technology such as the Index Matched Lens System. Now, with the option of new calcium-fluoride, high-definition lenses, their performance is completely supercharged, with absolute clarity that’s stunning even to sophisticated binoculars users. The plasma-coated prisms work with the lens system to maximize light transmission, for supreme clarity, contrast, and color fidelity. Leupold’s exclusive DiamondCoat™ and 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. Second Generation Argon/Krypton waterproofing is guaranteed for life. The interpupillary distance lock makes one-handed use easy. Rugged, waterproof, and guaranteed for life.