SkyMaster Pro binoculars are the ideal choice for amateur astronomers or anyone that observes at great distances. SkyMaster Pro uses superior optics, coatings, internal parts, and housing materials compared to lower-priced, large-aperture binoculars. With large objective lenses, BaK-4 prisms, and fully multi-coated optics utilizing Celestron's proprietary XLT coating technology, the view through a SkyMaster Pro is second to none at this price point. The 80mm objective lenses have tremendous light-gathering capabilities, delivering superior low-light performance, even in the dimmest conditions. Every air-to-glass surface is multi-coated with Celestron's proprietary XLT coating technology. These coatings and BaK-4 prisms increase light transmission through the optical path and deliver crisp, high-contrast images with excellent resolution. The SkyMaster Pro 20x80 mm's built-in tripod adapter allows the binocular to be attached to a tripod for added stability during longer viewing sessions and also allows a red-dot finder to be attached to it utilizing the included RSR “Reflex Sight Ready” Rail. Simply align your reflex sight with the binocular, and you can locate objects in seconds with the red-dot finderscope. The polycarbonate and aluminum housing allows the binocular to be lighter weight without sacrificing its durability. The protective rubber armor is extremely rugged and durable and can handle demanding use. The fully waterproof housing for all weather conditions provides peace of mind when unexpected weather occurs. The housing is also filled with dry nitrogen gas to prevent the internal lenses from fogging when moving between extreme temperatures or using the binocular in damp conditions. Bring distant objects into view with 20x magnification—great for observing celestial objects in greater detail, searching for wildlife in the brush, or viewing a distant object on the horizon.