Night Owl 3X Monocular National Geographic Elite Edition

Two-piece, rubber-coated body Easy to use and operate Built-in, high-quality Infrared Illuminator Auto-gain control to eliminate negative effects of bright light Four-piece objective and five-piece ocular, all-glass element, camera-quality 3x lens Soft-touch On/Off and I/R control buttons Intensifier Tube Generation: Gen 1 Elite Magnification: 3.0x Range of View (ft): 575 ft. Range of View (m): 175 m. Resolution (lp / mm): 24 Spectral Sensitivity (nm): 400-900 nm. Power Supply: 3 Volt Lithium Battery Weight: 32 oz. (907 g.) Dimensions: 6.9 L x 6.1 W x 2.6 H (inches) Operating Temp: -22 Fahrenheit to + 113 Fahrenheit Objective Lens Focal Length: 50 mm Aperature 1:1.2 FOV @ 1000 yards: 628 ft. FOV @ 1000 meters: 191 m. Focusing Range: 5 ft (1.5 m) + Material: Glass Number of Elements: 4 Ocular Lens Focal Length (eye relief): 12 mm. Diopter Adjustment: -4 to +4 Material: Glass Number of Elements: 5