These rugged binoculars are among the best National Geographic Offers. BAK-4 roof prisms and fully multicoated lenses gather the maximum amount of light for unbeatable sharpness and color clarity, even at dawn and dusk. Both waterproof and fogproof, with a rubberized shockproof body, theyre precise in any condition and tough enough to be jostled around in a backpack. Twist-up eyecups allow easy focusing with or without eyeglasses. Plus they're tripod mountable for setting your sights on a nest or feeder. Field of view is 114 meters at 1000meters. Includes a wide neck strap, carrying case, and cleaning cloth. Specifications: Magnification: 8 x Objective Diameter: 42 mm Field of View: 114/1000m Optical Sytsem: Roof BAK4 Optical Coating: Multi- Coated Dimensions: 15x130x55mm Weight: 710g