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 upgraded version of our best-selling 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'll 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'll keep your eyes fresh through hours of hillside glassing. - Elite Optical System - Open Bridge Roof Prism Design - Diamond Coat 2 - Fully Multi-coated Lens System - Guard-ion - High Definition - Phase Coated - Tripod Ready - Armor Coated - Ergonomic Design - Over-sized Eyepiece - Smooth Central Focusing Dial - Twist Up Eyecups - Field Replaceable Eyecups - Fogproof - Waterproof - Interchangeable Form-Fit Eyecups - Locking Diopter Adjustment - Specifications - Length (in) 6.8 - Weight (oz) 28.7 - Magnification 10 - Objective Lens Diameter (mm) 50 - Linear FOV (ft@1000 yd) 299 - Angular FOV (Degrees) 5.7 - Eye Relief (mm) 19 - Exit Pupil (mm) 5 - Close Focus Distance (ft) 9.3 - Interpupillary Distance Max (mm) 74 - Interpupillary Distance Min (mm) 56