" 100% waterproof, O-ring sealed and nitrogen purged for reliable, fog-free performance BaK-4 prisms and multi-coated optics offer crisp clear images with improved light transmission Non-slip rubber armor and Soft Texture Grip absorbs shock and provides a firm grip 12x magnification and 42mm objective diameter; 15-foot close focus distance; 15mm eye relief Large center-focus knob for easy adjustments; Twist-up eyecups; Limited lifetime warranty Quality optics with stunning HD clarity 100% quality materials used and tested extensively Show More"