The S-TAC series is built to last with a durable one-piece main-tube and all weather construction. It features Zact-7 multi-coating with precision ground lenses to give you a crisp clear picture, no matter what power. The ExacTrack windage and elevation adjustments give you precise adjustments that will get on target and keep you there. Fogproof, waterproof and shockproof comes standard, so no matter the conditions you will be able to see your target. FeaturesFast Focus EyepieceExacTrack Windage and Elevation Adjustment SystemAll Weather ConstructionZact-7 Revcoat Multi-Coating, 7 Layer multi-coating with precision ground glassAircraft Aluminum One-Piece Main-TubeFogproof, Waterproof and Shockproof