Endeavor HD Spotting Scope is the most advanced piece of optical equipment Vanguard has ever produced. The optical system employs extra-low dispersion glass (ED) to ensure accurate color rendition and virtually eliminate color fringing. The lenses are all fully multi-coated to ensure optimum light transmission and feature a phase-coated BAK4 roof prism. Endeavor 65A comes with an 82mm objective lens and angled eyepiece with 15-45x zoom magnification.  It features an extendable rubber covered eyecup and boasts impressive eye relief even at the highest zoom settings.