Magnification 10x Objective Lens Dia 42 mm / 1.6 in Exit Pupil 4.1 mm / 0.16 in Eye Relief N/A Light Transmission N/A Min. Focal Distance N/A Lens Coating Fully Multi-coated Prism Glass BaK-4, Roof Prism Prism Coating Silver Alloy Focusing System Central Linear Field of View 305 ft @ 1000 yds Linear Field of View 102 m @ 1000 m Angular Field of View 5.8 ° Optical Structure 4 Groups 6 Lens Diopter Right Eyepiece Diopter Compensation -4 to +4 Waterproof IPX6 Material Reinforced Polycarbonate Housing Material N/A Operating temperature -20 to +60 ℃ Recommended Storage Environment 10-25 ℃ Size 147x126x53 mm Weight (including caps) 604 g / 21.3 oz Eyecups N/A Items in the Package With Strap, Instruction, Cleaning Cloth, Pouch, Retail Package, etc