The revolutionary Vanguard Endeavor ED IV binocular is the result of innovation from the Vanguard optical team. Unrivaled brightness, clarity and extended viewing times allows master birders and serious outdoorsman to experience viewing nature in a totally new dimension.Is your life described or defined with an avid passion for the outdoors, enjoying nature and a craving for adventure? Then the new Endeavor ED IV binocular series will offer the features you need while exceeding your expectations. The innovative pairing of Premium HOYA ED (Extra-low Dispersion) glass and SK-15 Prisms allows master birders and serious outdoorsman to experience viewing nature in a totally new dimension.One of Vanguard's missions is to create the most innovative optics on the planet. This remains true with the Endeavor ED IV binocular. Available in the popular sizes 10X42 and 8x42. With a refreshed design that provides enhanced ergonomics and optical performance, the Endeavor ED IV has reset the standard of quality in the Endeavor binocular series.The Endeavor ED IV debuts the SK15 prism which provides optimal image quality, excellent light transmission and color fidelity for a remarkable viewing experience. In addition to the new prism feature, Endeavor ED IV has been upgraded with advanced MultiGuard Coatings that provide even better light transmission for viewing in low light conditions. Endeavor ED IV's magnesium construction and housing is engineered to provide perfect balance and robust light weight protection. The new ergonomic open hinge design and large focus wheel provides easy handling and precise focusing in all weather conditions.Endeavor ED IV was designed for comfort. This binocular has a newly integrated center locking diopter that allows the user to comfortably fine tune their view settings and three stage adjustable locking eyecups for setting the perfect eye relief. A tripod adaptor is incorporated in the front hinge for those long viewing periods or for glassing at long distances. The culmination of a refreshed and elegant design, new optical technology, perfect ergonomics and stunning color and detail make the Endeavor ED IV the clear choice for master birders, avid outdoorsman or anyone serious about wanting to see and experience the word in exceptional detail. The Endeavor ED IV is backed by an industry leading warranty to allow the user to rest assured that their investment in quality is covered.