Leupold VX-6HD Rifles Scope -The VX-6HD 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 new CDS-ZL2 (Custom Dial System ZeroLock 2) elevation and ZeroLock windage dial lock in place so they cannot be inadvertently rotated o their 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.