Specifications for Steiner Military Scope - M5Xi: Magnification: 5-25x Objective Lens: 56mm Focal Plane: 1st Reticle: Horus 59 Turret Direction: Counter Clockwise Tube Diameter: 34mm Color: Black Field of View at 100 yds: 7 - 1.4 m (23.6 - 4.6 ft.) Eye Relief: 9 -11 cm (3.5 - 4.3 in.) Exit Pupil: 9.8 - 2.2 mm Length: 42 cm (16.5 in.) Weight: 1 kg. (36.3 oz) Diopter Adjustment Range: +2 to -3 Illumination Control: Rotary Digital Control with Intermediate Stops Elevation Adjustment Knob: DuoScale™ / Resettable Zero Wind/Elevation Click Value: 1 cm (0.1 mrad) Windage Range at 100 m: 60 cm (6 mils) Elevation Range at 100 m: 260 cm (26 mils) Parallax/Focus: Side Focus Parallax/Focus Range: 50 m (164 ft.) to Infinity Nitrogen Filled: Yes Operating Temperature Range: -25 to 63° C ( -13° to +145° F) Lens Cap: Yes Waterproof/Fogproof: Submersible to 10 m (33 ft.) Battery: CR 2450 Special Features: Adjustment Knobs 100% Sealed Features of Steiner M5Xi 5-25x Military Tactical Scope: One-Piece Oversized 34mm Tube increases strength and reliability and provides greater elevation and windage adjustments for longer ranges. Broadband Anti-Reflection Coatings for 94% + light transmission to ensure optimal performance in low light. Optimized Exterior Design with larger, positive grip elevation, windage, parallax and illumination knobs and non-slip diopter and magnification adjustment. Illuminated Reticle with seven night and four day levels with two "OFF" positions at each end, and quick standby levels between each for fast return setting. Optimized Tube and Knob Configuration for more mounting options and optimum performance with different rifles and added equipment. Precise Windage/Elevation Adjustment is easy and accurate for repeated accuracy, with tactile click-by-click feedback you can hear and feel. Waterproof/Fogproof durable construction you can trust to stand up to any cold or wet condition. Waterproof to depths of 10 meters (33 feet). Shockproof and rugged enough to withstand impact testing to 900 Gs on all optical and electronic components.