The revolutionary Vanguard Endeavor ED IV binoculars is the result of the innovative work of the Vanguard optical team. Do you have a passion for nature or a desire for adventure? Then the new Endeavor ED IV binoculars offer what you need. The combination of Premium HOYA ED (Extra-low Dispersion) glass and SK-15 Prisms allows bird watchers and outdoor people to look at nature in a completely new way. One of Vanguard's missions is to create the most innovative optics in the world. The Endeavor ED IV binoculars fit into this. Available in the popular sizes 10X42 and 8x42. With an updated design that delivers improved ergonomics and optical performance, the Endeavor ED IV has raised the standard of quality of the Endeavor binoculars series. The Endeavor ED IV is equipped with SK15 prism which offers optimum image quality, excellent light transmission and color fastness for a special viewing experience. In addition to the new prism function, the Endeavor ED IV has been upgraded with advanced MULTIGUARD Coatings that ensures even better light transmission in low light conditions. The Endeavor ED IV is designed to offer a perfect balance and robust lightweight protection. The open design and the focus wheel construction offer easy operation and precise focusing in all weather conditions.