AceFox Rifle Scope, Hunting Rifle Scope, Red/Green Illuminated Gun Scope with Free Mounts and Flip Up Scope Covers, Hunting Shooting Precision, 4 Different Optical Hunting Rifle Scopes, Black PRECISION : Magnification : 3 - 9 . Exit pupil : 16.6 - 5.4 mm. Field of view : 34.1 - 6.6 feet @100 yards. Eye relief : 110 mm. EASY TO MANEUVER : Two rotating hand wheel on the upper and right of the tube, easy to operate when shooting the target. VERSATILE : Different brightness levels for increased adaptability to environment, red or green dot crosshair with front focus eyepiece adjustment helps you shooting the target fast and accurately. FOG PROOF, RAIN PROOF AND SHOCKPROOF : Completely sealed and 100% nitrogen filled enables it Fog and Rain Resistant. HIGH-QUALITY : Durable metal construction and high grade optical glasses ensure long-time durability and a clear viewfinder image without the use of eyeglass.