Features: 1.Roof structure and IPX7 waterproof with filling nitrogen2.Pure optical fully multi-coated lens and sharp and clear imaging3.Wide angle large field of vision, comfortable and long eye relief, humanized observation experience; myopic users do not need to remove glasses to enjoy easy observations. The eye relief can reach 20.4mm and kilometer field of view up to 110m4.Multiple gears and twist-up eyecups is suitable for people with different visions5.Full texture of all metal focusing wheel with better interlocking and diamond pattern design, bringing handy operation experience6.The skin made of rubber not only can protect the product effectively, but also hold the handle comfortably at the same time7.Deeper eyecups design with 9.5 mm reduces the probability of dark shadow in the field of vision Specification: Power 8x OBJ. LENS DIA. 42mm Eyepiece Diameter 21mm Type of Prism Roof Bak4 Prism Coating Aluminizing Lens FMC Focus System Cent. Focusing Lens Int. Angle 6.3 Ft/1,000Yds 330ft M/1,000M 110m M / Ft. 4.5m/14.8ft Resolution 5.6" Eyecups Twist-up Exit Pupil 5.18mm Eye Relief 20.4mm DiopterSystem Right Ocular Diopter COMP. 3D Interpupillary Dist. 55~75mm Tripod Adapter interface Yes Water Proof IPX7 Nitrogen Filled Yes Net Weight 683.3g/24.10oz Unit Dimension 155x132x51mm Package Include: lSV47 8x42 Binoculars Telescope lCarrying Bag lNeck Strap lLens Cleaning Cloth lLens Covers lUser Manual