Palm sized, and petite enough even women can enjoy the sights necessary to make your trip worth it. The classic design and Porro prism optical system make the BX-1 RogueA(R) a familiar favorite for all types of bino users. Magnification: 10X Objective Size: 25mm Length: 4.3" Weight: 12.7 oz Linear Field of View (ft/1000 yd): 294&'; Eye Relief: 15 mm Fully multi-coated lenses Proprietary Nitrogen Fill Process Synergy Built Smooth Focusing Twist Up Eyecups Close focus distance of 10 feet Ergonomic Design Diopter Focus BAK 4 Prisms Optimizes light transmission for enhanced brightness, clarity, and contrast Porro prism system maximizes light transmission for crisp images Rugged, Fogproof and waterproof Performs in any condition