HIGH POWERED AND A LARGE FIELD OF VIEW - The 10x magnification ensures closeup viewing at a distance. At 1000 yards, the field of view is 283ft. The generous 42 mm lens diameter gathers a large amount of light, and the fully coated optics ensure maximum brightness and clarity. WATERPROOF AND FOGPROOF - This binocular is both waterproof and fogproof making it ideal for outdoor activities near or on water. VERSATILE - The compact roof prism design is ideal for a wide range of activities including bird watching, hiking, hunting, camping, wildlife observation or even whale watching on a cruise. QUALITY ASSURED: Manufactured by Bresser and licensed by National Geographic, you can be assured of quality construction and support after the sale. YOUR PURCHASE HAS PURPOSE: Every purchase helps support the global nonprofit National Geographic Society in its work to protect and illuminate our world through exploration, research, and education. These versatile National Geographic 10x42 binoculars are an ideal companion for all of your outdoor adventures. Whether you are hiking, birdwatching, camping or traveling, a solid pair of binoculars can be a handy tool. The 42mm aperture brings in lots of light and combines with the fully coated optics to produce images with excellent contrast and clarity and the 10x magnification delivers crisp details. Additional features include twist-up eyecups for comfortable viewing, lens covers for protection, a sleek roof prism design that is easy to grip and a tripod thread.