The Vortex Optics Sheltered Wings Viper High Density Binocular 8 x 32 (SWVPR3208HD) provides an optimal performance for an exciting outdoor adventure activities. It features a roof prism and HD lens for high quality images. It also has XR lens with an anti-reflective coatings, dielectric prism coatings for more correct image color and a phase correction that improves contrast and resolution. The binocular is designed with well-secured, water proof and fog proof parts. It includes an ArmorTek that protects the unit from hard scratches, oil and dirt. The rubber armor creates a slip-free grip external. Viper High Density Binocular is equipped with an adjustable, twist eye cups for comfortable viewing with or without glasses. At the right eyepiece is a locking diopter that is intended to be adjusted for dissimilarity in a user's eyes. The center focus wheel adjusts the focus of both binocular barrels at the same time. Product has a 400' / 7.6° (1000 yards / degrees) field of view and it weighs 20.6 ounce. Viper is compatible with a tripod adapter.