The Vudu 3.5-18x50 provides a robust 34mm tube, XC high-density glass, and is loaded with other performance features required to take that precise long-range shot. The oversized and precision-machined turrets, with EZ Check Zero Stop feature, let you quickly dial adjustments and return to zero, even in low light conditions. The side-mounted parallax adjustment allows you to easily dial-in the reticle focus. Features: Aircraft: Aircraft-grade aluminum, single piece construction with anodized finish for extreme durability. Laser-etched adjustment indicators and push-button illumination controls for tracking east. Water-resistant, fog-resistant, shock-resistance with single construction eyepiece Fog Resistant: Nitrogen gas purging prevents internal fogging over the operating temperature range Shock Resistant: The rugged design prevents damage from heavy recoil and rough handling. Water Resistant: The single-piece tube and o-ring seals prevent moisture and dust from entering the scope even in the harshest environments. Anti-Reflective Lenses: XC high-density, low dispersion glass with anti reflective coated lenses provides efficient light transmission and unmatched edge-to-edge clarity. Water-resistant, fog-resistat, shock-resistant with single construction eyepiece. Specifications: First Focal Plane Overall Length: 15.13" Weight: 33.6oz Magnification: 3.5-18x Tube Diameter: 34mm Objective Diameter: 50mm Power Source: CR2032 Eye Relief 3.5x: 3.58" to 3.97" 18x: 3.54" to 3.97" Field of View at 100 Yards: 3.5x: 29.5ft 18x: 5.7ft Country of Origin: Japan Horus H59 Reticle: The MRAD based H59 reticle features the popular horizontal and vertical grid pattern that allows for built-in range-finding, holdovers, and wind compensation to maximize extreme-range precision. The windage tree is also perfect for quick follow-up corrections Adjustment Graduation per Click: 0.1 MRAD Adjust Graduation per Rotation: 10 MRAD Total Elevation Travel: 29 MRAD Total Windage Travel: 23 MRAD