Eschenbach Arena D+ 10x50 Waterproof Binoculars for Bird Watching for Adults WATER PROOF & FOGPROOF: While with other binoculars the optics are fogging, our binoculars are nitrogen filled and absolutely watertight, suitable for any kind of weather, and the lenses are multi-coated. Bring it with you when camping! HIGH POWER & ULTRASHARP 10X50 SUPERZOOM binoculars thanks to top quality BAK-4 prisms: powerful, lightweight and compact binoculars for birdwatching, safari, sport, hiking and every outdoor activity. Perfect for eagle watcher and mountain excursion EXCEPTIONALLY BRIGHT DUE TO LENS AND ADDITIONAL SILVERING of the prisms. Eye-friendly: the silvering reduces harmful UV radiation and the eyecups allows the use of (sun)glasses. Ideal binoculars for adults BAK-4 PRISMS: these specially selected and carefully machined high-performance prisms manufactured from barium crown glass provide even better resolution of details and a brighter image with high color fidelity DEVELOPED IN GERMANY: ESCHENBACHs story started over 100 years ago with an idea: precision. This is a guiding principle that we follow as a developer of quality optical products. We follow traditional values like experience, skill and vision