Leupold 8X42mm Wind River Olympic Roof Prism Green Ring Binoculars deliver the kind of performance birds haven't thought possible in a binocular that is both affordable and lightweight. Leupold 8x42 mm Wind River Olympic Roof Prism Binocular is light (only 21.7 oz.) and well-balanced enough to use as your full-time birding optics. When you start identifying birds altogether, you'll be glad you have that added power, without the added weight. Color fidelity, brightness, and clarity. Close focus distance, Twist-upeyecups and ample eye relief. Leupold 8 x 42 WindRiver Olympic Binoculars are built rugged and 100 percent waterproof.