Bushnell 138005 H2O Waterproof/Fogproof Compact Roof Prism Binocular, 8 x 25-mm, Black

Magnification x Objective: 8 x 25 millimeter BaK 4 prisms for bright, clear, crisp viewing Multi coated optics for excellent light transmission 100 percent waterproof : O ring sealed and nitrogen purged Non slip rubber armor absorbs shock while providing a firm grip 100 percent waterproof, O ring sealed and nitrogen purged for reliable, fog free performance 15 foot close focus distance; 12 millimeter eye relief Large center focus knob for easy adjustments; Twist up eye cups; Limited lifetime warranty