Vanguard Endeavor ED IV mm Binocular Black Endeavor ED IV. These Binoculars from Vanguard contain HOYA ED (Extra-low Dispersion) glass that corrects and compensates for standard and high-contrast images with no chromatic aberration and its SK15 prism provides optimal image quality excellent light transmission and color fidelity for an incredible viewing experience in all lighting conditions. The Vanguard Endeavor ED IV 10x42 Birding Binocular provides a generous amount of eye relief ensuring comfort so that you can glass for hours on end. These Vanguard Binoculars are made for birders and avid outdoorsmen who demand top quality and durability from their binoculars featuring a magnesium alloy body that provides an optimum balance of light weight and protection from the elements. For a lightweight and durable binocular that will perform in all weather conditions get the Vanguard Endeavor ED IV 10x42 Lightweight Binocular. Specifications for Vanguard 10X42 Endeavor ED IV Binocular: Manufacturer: Vanguard Color: Black Magnification: 10 x Objective Lens Diameter: 42 mm Exit Pupil: 4.2 mm Field of View Linear: 377 ft at 1000 yds Binoculars Focus System: Center Focus Twilight Factor: 18.3 Weather Resistance: Yes Water Resistance Level: Waterproof Weight: 27.73 oz Finish: Magnesium Alloy Magnification Type: Fixed Package Contents: Vanguard Endeavor ED IV Binocular Vanguard Endeavor ED IV 1042: Endeavor ED IV 10x42 mm Binocular Black