The Vortex Viper HD 15-45x65 Angled Spotting Scope incorporates HD glass elements that ensure reduced chromatic aberration; stunning colour fidelity; edge-to-edge sharpness, and fantastic light transmission. Additionally, XR Lens coatings, Armortek external lens protection, Dielectric prism coatings along with other impressive features, allow users to see far away subjects from much closer with outstanding image resolution. Users are able to focus on their subject quickly and precisely thanks to the sleek helical focus. This design also allows for easy storage and transportation of the scope.