XR Plus antireflective coatings on all air-to-glass surfaces provide maximum light transmission; Multilayered dielectric prism coatings offer bright, clear, color-accurate images; Arca-style foot makes tripod mounting fast and easy; also features a female 1/4"-20 thread; Armortek ultra-hard exterior lens coatings defend against scratches, oil, and dirt; Rubber armor allows a secure, nonslip grip and durable external protection; Argon gas purged and O-ring sealed for fog and waterproof performance; Neoprene case can stay on while scope is in use