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