Outfitted with premium Hoya ED (Extra-low Dispersion) glass, Vanguard's
Endeavor ED II binoculars possess excellent edge-to-edge clarity and
brightness. The optics are nitrogen purged to prevent fogging and the
lightweight magnesium alloy body has been completely redesigned: It is
now fully waterproof and shockproof, while being extremely comfortable
and stable in the hand.