The improved slim design and the advanced functions bring the well established optical superiority of the Z6 rifle scopes to perfection: The newly designed mechanisms on the Ballistic Turret and the Parallax Turret optimise their handling. SWAROLIGHT technology with automatic on-off function for illuminated reticles increases battery life. Swarovski Z6i riflescopes offer the latest in user flexibility with their large 6x zoom range and the latest in features. These innovations include: Slim 30mm main tube 6x zoom range ensures optimum visibility at all distances SWAROCLEAN non-stick lens coating increases the ability of the lens to resist dirt, water marks, tree sap and resin, and insect repellents Large eye relief and field of view optimize usability of scope in low-light dawn and dusk situations SWAROLIGHT illumination with compact illumination controls and auto-switch-off battery conservation. The automatic switch features a tilt sensor which detects whether the rifle is in a shooting position and turns the illumination off if the scope is not, saving battery and extending service life Spare battery included in windage turret housing allows redundancy of illumination power source Optional Ballistic Turret (BT) models include ability to personally set up to three known distances to easily adjust to targets at range, even in low light situations Swarovski Optik Swarovski Z6i 3-18x50 4A-I Riflescope Black 69638