The redesigned Leupold VX-3 Rifle Scope combines years of optical technology into one package to create a rifle scope that will become a favorite of hunters and shooters. The Quantum Optical System with Xtended Twilight lens technology advances beyond index matched lenses by specifically targeting the color spectrum that is most present in those critical final minutes of fading light, allowing you to clearly see targets for longer. The lenses also feature the Diamondcoat 2 lens coating which provides abrasion resistance and are edge-blackened to improve resolution by reducing glare. The precision twin spring erector has cryogenically treated adjustments to provide the utmost precision and 30 percent more holding force to ensure reliability. A Custom Dial System (CDS) is a ballistically matched turret that is specific to any load you specify, and is available with select models. The fast focus eye piece allows for quick adjustments in the field at times when a split second might mean the difference between filling your tag and going home empty-handed. Every Leupold VX-3 Rifle Scope is water, fog and shockproof and is purged with second generation argon/krypton gas. Covered by the Leupold Full Lifetime Guarantee.