20x50 BAK4 Lens Binoculars High-Definition Professional WaterproofProduct description:Professional High Powered BinocularsBinoculars with 20X high power magnification and 50mm objective lens, provides wider field of view at 1000 yards. perfect binoculars for bird watching, concerts, football game,climbing, hiking, driving, watching animal and scenery. It also features higher-resolution,greater light transmittance and Mindistortion, provides bright and sharp images without color difference.Weak Light Vision with Quality Optics This HD binoculars watching comes with BAK-4 Prism and FMC film lens, which minimizes the loss of light due to reflection, thereby ensuring brighter and clearer high-contrast images. It has the effect of low-light night vision,It cannot be used in a completely dark environment.Binoculars for Adults KidsOur HD binoculars perfectly fit adults and some children,it comes with adjustable twist-up eyecups for comfortable use with glasses or without. The folding function makes binoculars easy to focus to obtain a clear image, very simple to operate even by kids.Durable, Waterproof Comfortable Grippowerful binoculars is made of rubber-armored coating and leather, O-ring sealed optics with fog-proof coating prevents moisture, dust, and debris from getting inside the binoculars, ensures it waterproof,shock-resistance, durable and provides a firm grip.The objective lens is provided with FMC full broadband coating, A + 1 coating process, and the light transmittance is up to 99.5%.Specifications: Model: 20 50Specification: 20 50 (20 times, objective lens = 50MM)Field of view: 119M / 1000MPrism: BAK4Brightness index: 25Low light coefficient: 22.36Waterproof: Class A waterproofFocusing system: center / right eye focusingRubber shell: Corrosion-resistant high-quality rubber sheath1000 meters horizon: 56/1000Operating temperature: -40-+50 degrees CelsiusPreservation: Store in a dry environmentNote:Please allow 0.5-1cm errors due to manual measurementDue to the difference between differentmonitors, the picture may not reflect the actual color of the item.Package Included: 1 Telescope,1 Shockproof Package,1 Mirror Cloth1 Lanyard2 Lens cap