The VX-5HD is taking optical performance to a whole new level. We gave it a High-Definition optical system for sharpened clarity, and the Twilight MaxTM Light Management System for even greater low-light performance, giving hunters a visible advantage at dawn and dusk when the biggest game is on the move. The VX-5HD also features Leupolds Guard-ion Lens Coating which sheds water, dirt and fingerprints. Some VX-5HD models feature the new CDS-ZL2 (Custom Dial System ZeroLock 2) elevation to lock in place so it cannot be inadvertently rotated off its zero. A mere press of a button will allow the user to dial up two turns of elevation, if necessary. On the 2nd revolution of the elevation dial, the button sinks in to show you are on the 2nd turn so you can dial for extended ranges and never lose your place. All VX-5HD CDS-ZL2 riflescopes include one free Custom Ballistic Dial with purchase. Some VX-5HD scopes include illuminated reticles with an easy to use 1 button intensity adjustment. The VX-5HD also comes with protective lens covers. There also Alumina Lens Flipback Covers available additional as well as a new Throw Lever which can be reversed for Left Handed Bolt Rifle applications.