Vortex Viper HD Spotting Scopes are a remarkable choice for requirements such as long range observation. The series incorporates HD (High Density) extra-low dispersion glass that generates superior resolution and color fidelity and results in High Definition images, and XR fully multi-coated lenses for maximum brightness. It is rendered complete with porro prism for utmost image quality and performance without letting go of the traditional design. Vortex Viper HD Spotting Scope’s list of features is also inclusive of ArmorTek ultra-hard scratch-resistant coating on exterior lens surface, dielectric prism coatings for clarity, brightness and color-accuracy, dual focus for fine adjustments, adjustable eyecups for customized fit and comfortable viewing, argon gas purging for fogproof performance, o-ring for waterproof integrity and picatinny rail to attach red dot sights or other accessories. The HD Spotting Scopes category from Vortex is divided into 20-60x80 variants with Angled or Straight eyepiece position and 15-45x65 variants with Angled or Straight eyepiece position. Features of Viper HD Spotting Scopes Angled Body Design for overall lower mounting height or Straight Body Design for speedy target acquisition HD Lens Elements with high density extra-low dispersion glass XR Plus Fully Multi-Coated lenses ArmorTek coating Argon gas purging O-ring seals Adjustable Eyecup Dielectric Prism Coatings Porro Prism Picatinny Rail