Leupold's VX-6HD features a 1/4 MOA finger click adjustments, a 30mm maintube that is constructed of 6061-T6 Aircraft Quality Aluminum and a powerful 6:1 zoom ratio delivers crystal clear images from edge-to-edge throughout the entire magnification range. The CDS (custom dial system) allows you to quickly dial your elevation to different sight-in ranges with a custom adjustment matched to your specific ballistics information. Its internal Electronic Reticle Level makes it easy to get the reticle straight when mounting a scope and the extreme fast-focus eyepiece ensures a generous eyebox, superior field of view and optimal diopter adjustment in the field. It allows the user to adjust through the full range of diopter adjustment in one complete turn of the eyepiece. This model also features water, dirt and fingerprint shedding lens coating and is extremely durable and scratch resistant. Included are alumina flipback lens covers.