The BX-4 Pro Guide HD Gen 2 10x42mm is a jack-of-all-trades when it comes to backcountry optics. Compact and lightweight, it has enough field of view for navigating tight areas while still offering plenty of magnification for wide-open spaces.Specifications and Features: Length (in): 5.7 Weight (oz): 25 Magnification: 10 Objective Lens Diameter (mm): 42 Linear FOV (ft@1000 yd): 314 Angular FOV (Degrees): 6 Eye Relief (mm): 17 Exit Pupil (mm): 4.2 Close Focus Distance (ft): 9.3 Interpupillary Distance Max (mm): 74 Interpupillary Distance Min (mm): 56