Leupold 171579: Legendary Leupold durability, ruggedness and stunning optical quality-- times six. With a powerful 6:1 zoom ratio, the Leupold1 VX-6HD delivers crystal clear images from edge-to-edge throughout the entire magnification range. Leupold\'s legendary Twilight Max Light Management System and DiamondCoat 2 combine with edge-blackened lead free lenses for astonishing clarity and light transmission. The extreme fast-focus eyepiece ensures a generous eyebox, superior field of view and optimal diopter adjustment in the field. A rugged 34mm maintube, twin bias spring erector system, and two turn CDS Zero Lock finger click adjustments assure maximum adjustment range and precision. All Leupold VX-6HD rifle scopes include one free Custom Ballistic Dial with purchase. Leupold second generation Argon/Krypton waterproofing resists the effects of thermal shock much more efficiently than standard nitrogen.