View the natural world up close with the COSMOS Tree of Life 10x42 Binocular by Celestron - the perfect companion for your next outdoor odyssey. Designed for optimum views of wildlife and landscapes - Tree of Life Binoculars feature phase-coated BaK-4 prisms and fully multi-coated optics for great image detail.Sophisticated optics high-quality BaK-4 prisms are phase coated to increase contrast and resolution. Fully multi-coated optics provide maximum light transmission through the entire optical path - for brighter images - even in low light conditions. The full-size 10x42 model is a great step up into the world of serious binoculars. You’ll get high magnification for a closer view of your subject - especially if you are observing it from a distance. The 42 mm objective lenses are a popular choice since they are large enough to gather more light than compact binoculars - but are still light enough to comfortably handhold for longer observing sessions. Binoculars that fit your lifestyle Waterproof - fogproof - and nitrogen purged - these binoculars can withstand the elements. A durable rubber armored - polycarbonate housing protects your Tree of Life Binocular from damage without weighing you down. Twist-up eyecups with multiple stops ensure proper positioning of the eyes - even for eyeglass wearers. Inspired by COSMOS: A SpaceTime Odyssey Airing this spring on FOX and National Geographic Channel - COSMOS: A SpaceTime Odyssey explores how each one of us is connected to nature and the Tree of Life. In that same spirit - Celestron engineers designed the COSMOS Tree of Life Binocular as the ideal tool for observing the natural world. Tree of Life’s unique rubber armor in light desert sand offers a distinctive look - and the Tree of Life adorns the focus knob.