National Geographic 10x32 Binocular. Perfect for activities ranging from hiking to sporting events these binoculars are sized to keep close and use fully multi-coated barium crown glass optics to enhance the contrast and clarity of the bright images produced by the 32mm aperture. They also have a 10x magnification for well-defined details a centrally located focusing wheel and diopter adjustment capability to allow both eyes to achieve ideal focus. Housed in water-resistant rubber armoring the binoculars include a tripod thread for hands-free viewing a neck strap for stability a case and a cleaning cloth. Specifications for National Geographic Roof Prism Binocular 10x32mm: Manufacturer: National Geographic Color: Black Magnification: 10 x Objective Lens Diameter: 32 mm Prism System: Roof Field of View Linear: 315 ft at 1000 yds Binoculars Focus System: Center Focus Twilight Factor: 17.89 Package Type: Clam Pack/ Plastic Included Accessories: Lens Covers Case Strap Magnification Type: Fixed Package Contents: National Geographic Binocular 10x32 National Geographic 80-01032-CP: 10x32 Binocular