Elite optical system Ergonomic design Fully multi-coated lens system High definition Open bridge roof prism design Phase/Armor coated Tripod ready Twist up eyecups Waterproof & fogproof Similar to its 42mm counterpart, the BX-4 Pro Guide HD Gen 2 10x50mm is a versatile optic for backcountry hunters. However, its 50mm objectives go the extra mile, collecting even more light for improved long-range identification. This binocular uses high-quality glass and improved lens coatings to deliver the resolution, clarity, and glare reduction diehard hunters and shooters demand - no matter the time of day, you will be able to conquer the challenges of harsh light and bright reflections. Along with its outstanding optical system, the BX-4 Pro Guide HD Gen 2 includes interchangeable Form-Fit eyecups that will keep your eyes fresh through hours of hillside glassing.