4237840 Features: -Binocular.-Offers the widest angle viewing, even for spectacle wearers.-Classic porro design.-Easy to operate with a tactile central focusing and diopter adjustment.-Watertight and therefore ideal for animal watching and nature viewing in all weather.-Nitrogen filling prevents misting up of internal optical components due to temperature changes.-Images are bright and sharp thanks to full multi coating.-Shaped thumb recesses make comfortable to use for long periods of time.-8 x Magnification.-Twilight power: 17.9.-BaK-4 prisms.-Lens diameter: 40 mm. Dimensions: -Height: 142".