All the full sized features of the BX-1 Rogue Series packed into a palm-sized package. - Waterproof/Fogproof - Proprietary Nitrogen Fill Process - Synergy Built - View Full Description - Smooth Focusing - Twist Up Eyecups - Armor coated rugged and waterproof - Close focus distance of 10 feet. - Ergonomic Design - Diopter Focus - Porro Prism Design - Fully Multi coated Lens System - BAK 4 Prisms - Interpupillary Distance: 57 - 71 - Actual Magnification: 10x - Objective Clear Aperture: 25 mm - Linear Field of View (ft/1000 yd): 294.00 ft - Linear Field of View (m/1000 m): 89.00 m - Angular Field of View: 5.60 degrees - Twilight Factor: 15.80 - Weight: 12.7 oz - Length: 4.3 - Eye Relief: 15 mm - Close Focus Distance: 14.10 ft