Vanguard ENDEAVOR HD 65A Spotting Scope with 15-45x ZoomEndeavor 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 a 65mm objective lens and angled eyepiece with 15 45x zoom magnification.