Ncstar's shooter rifle scope 3-9x 40mm is completely waterproof, fogproof and dustproof.The glass is crystal clear and the fit and finish are beautiful.It has multi-coated lenses and variable power magnification.Adj Size: .25 MOA @ 100 ydsMagnification: 3-9xObjective: 40mmField Of View: 36.60-13.60 ft @ 100 ydsEye Relief: 2.80"-3.30"Tube Diameter: 1"Length: 12.20"Weight: 16.10 ozReticle: P4 SniperParallax Adjustment: P4 SniperProofs: 13.3-4.4mmCoating Type: WaterproofOptic Coating: Multi-CoatedOptic Coating: Multi-Coated