Ultra-rugged, remarkably adaptable, Viper HD helps you thrive where others falter. Designed for every challenge, every game, and terrain-from river bottoms to the Rockies, it delivers bright, sharp images even in the toughest conditions. Whether glassing for game or sighting in at the range, Viper HD provides the clarity and ultra-rugged construction serious hunters need to create opportunities that lead to success.Specifications and Features: Magnification: 20-60x Objective Lens Diameter: 85 mm Eye Relief: 17.8mm - 19.6mm Angular Field of View: 1.9deg - 1.0deg Close Focus: 36.0' Linear Field of View: 101' - 50' @ 1000 yds Length: 17.5" Weight: 76.6 oz.