Measuring range: 33-1500yd, and plasmin; 1 yd. SWARO-AIM Ballistic Compensation Compact Roof Prism Optical Path SWARO-BRIGHT Fully Multi-coated Optics Wide Angle Viewing: 63° Nitrogen-Filled: Fog proof, Submersible Open Bridge Configuration Magnesium Alloy Chassis Center Focusing, Dual Locking Diopters Twist-Up Click-Stop Eye cups