HD Optical System - Optimized With Select Glass Elements To Deliver Exceptional Resolution, Cut Chromatic Aberration, And Provide Outstanding Color Fidelity, Edge-to-edge Sharpness, And Light Transmission. XR Plus Lens Coatings - Ultimate Anti-reflective Coatings On All Air-to-glass Surfaces Provide Maximum Light Transmission For Peak Clarity And The Pinnacle Of Low-light Performance Dielectric Prism Coatings - Multi-layer Prism Coatings Provide Bright, Clear, Color-accurate Images Phase Correction - Coating On Roof Prism Enhances Resolution And Contrast Apochromatic - Index-matched Lenses Correct Color Across The Entire Visual Spectrum Armortek - Ultra-hard Exterior Lens Coatings Defend Against Scratches Oil And Dirt Helical Focus - Focus Mechanism Type Rubber Armor - Provides A Secure, Non-slip Grip, And Durable External Protection Plasma Tech - Cutting Edge Application Process Provides Unparalleled Coating Durability And Performance Argon Gas Purged - Gas Purged And O-ring Sealed For Superior Fogproof And Waterproof Performance In The Most Extreme Conditions Waterproof - Designed To Withstand Harsh Weather Conditions Fogproof - Designed To Withstand A Wide Range Of Temperatures Shockproof - Designed To Withstand Impact Tripod Adaptable - Allowing Use On A Tripod Or Car Window Mount Arca-swiss Compatible What's in the Box : Lens covers Neoprene case Lens Cloth