10-180X100 Zoom Binoculars: Due to the high zoom ratio of 10X to 180X, this professional binocular zoom binoculars can be used in opera houses, mountains, hiking and concerts.FMC Objective & BAK4 Prism: Multi-coated lenses can effectively reduce glare and ghosting, make the image clearer, and effectively restore the real image. It can also be used in dim light conditions. The minimization of stray light results in the best optical image and perfect vision.Waterproof and Durable: This binoculars prevent moisture, dust and debris from entering the binoculars, are designed to suppress fogging inside, and have a durable body that is suitable for everyday use and most outdoor environments. (Caution: do not fully submerge in water!)Wide Field of View: 22mm lar.