Kowa YF II 6x30mm Porro System Binocular Fully Multi-Coated Rubber Green 30-6. A traditional porro-prism design and a low power magnification are the perfect combination producing an extremely wide field of view. This feature allows the user to observe comfortably for long periods of time and quickly locate subjects. The YF II Series are 100percent waterproof and feature a tough and tactile rubber armoured shell. All optical components in the YF II Series are manufactured from high quality Japanese eco-glass and all surfaces are fully multi-coated. These coatings ensure that light transmission colour definition brightness and contrast are always performing at a maximum. The binoculars produce clear and vivid images with natural colour and contrast. The YF II series are particularly easy to use and are perfect for the young or old. The ideal choice for nature astronomy hiking festivals and many outdoor activities. Specifications for Kowa YF II 6x30mm Porro Prism Binocular: Manufacturer: Kowa Color: Green Magnification: 6 x Objective Lens Diameter: 30 mm Prism System: Porro Image Stabilizer: No Eye Relief: 20 mm Exit Pupil: 5 mm Field of View Linear: 140 m at 1000 m Field of View Angle: 8 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 13.4 Interpupillary Distance: 50 - 70 mm Close Focus: 5 m Weather Resistance: Fog Resistant Water Resistance Level: Waterproof Length: 6.3 in Weight: 16.5 oz Finish: Rubber Magnification Type: Fixed Width: 4.5 in Height: 1.9 in Features of Kowa YF II 6x30mm Porro Binocular Waterproof and dry nitrogen filled Ergonomic and lightweight Fully multi-coated optics KR protective coating Easy to use and superb value Package Contents: Kowa YF II 6x30mm Porro Binocular High Quality Case Padded Shoulder Strap Rain Guard Lens Caps Kowa YF II 30-6: YF II Binocular 6x Magnification 30mm Lens Porro System Fully Multi-Coated Green