VicTsing Waterproof Binoculars 8 X 35 and BAK4 Prism Folding Telescope with Binoculars Bag & Eyepieces Caps, Fully Multicoated(FMC) Optical Lenses for Concerts, Hunting, Hiking, Bird Watching, travell Advanced BAK4 Prism. BAK4 prism owns higher index of refraction than BAK7 prim. With perfect light transmittance, these binoculars provide you bright and vivid images without black background. Broader Field of View and More Comfortable. Adopted 26mm eyepieces and 35mm ultra wide angle objective lenses, it will bring you broader field of view and these binoculars provide 30% larger visible area than that of normal binoculars in the market. Your eyes will feel more comfortable with this binoculars. Fully Multicoated(FMC) Optical Lenses. This feature guarantees superior light transmission and brightness. Up to 99.5% transmittance, it will take you to into a clear and bright world in which you can appreciate fantastic landscape. 8X Magnification. If you get any higher magnification than 10X, they are difficult to handhold. 8X is the perfect magnification which is universally adopted in military binoculars. You can see your targets farther and more clearly in this magnification. Elaborate and Exquisite Design. Made out of high quality PVC material. Joint caps makes it not easy to be lost. Can be mounted on tripod, free your hands. With nonslip rubber protective layer, it has the features of skid proof and shock absorption. Sturdy and durable, this product is perfectly suitable for recreational use such as stadium sports, bird-watching, concerts, hunting, hiking, etc.