Vortex Diamondback 250th Anniversary HD Full Sized Binoculars - 10x42 - The Diamondback HD 10x42 250th Anniversary Edition is the same field-tested workhorse hunters trust. A 250th badge honors American independence, a mark of freedom and pride you can carry every season. Features 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.; Dielectric Prism Coatings - Multi-layer prism coatings provide bright, clear, color-accurate images.; Adjustable Eyecups - Twist up and down for comfortable viewing with or without eyeglasses.; Phase Correction - Coating on roof prism models enhances resolution and contrast.; Rubber Armor - Provides a secure, non-slip grip, and durable external protection.; Waterproof - Designed to withstand harsh weather conditions.; Shockproof - Designed to withstand the highest levels of impact.; Fully Multi Coated Lenses - Anti-reflective coatings on all air-to-glass surfaces provide increased light transmission for greater clarity and low-light performance.; True Open Hinge - Offers superior ergonomics while decreasing total weight and bulk.; Center Focus Wheel - Adjusts the focus of both binocular barrels at the same time.; Armortek - Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt.; Argon Gas Purge - Gas purged and O-ring sealed for fogproof and waterproof performance in all conditions.; Fogproof - Designed to withstand a wide range of temperatures.; Tripod Adaptable - Compatible with a tripod adapter, allowing use on a tripod or car window mount.;