Vortex Diamondback HD 10x42mm, Binoculars The Diamondback HD smashes the scale of price vs performance, delivering a rock-solid optic that optically punches high above its class. The included GlassPakTM binocular harness keeps your glass close at hand, ready to deploy at a moment's notice, all while providing protection and significantly more comfort than traditional neck straps. Specifications: Magnifications: 10x Objective Lens Diameter: 42mm Linear Field of View: 330ft/1000yrds Angular Field of View: 6.3 Degrees Eye Releif: 15mm Height: 5.7 Width: 5.1 Weight: 21.3oz Exit Pupil: 4.2mm Interpupillary Distance: 55mm - 73mm Close Focus: 5ft What's in the Box GlassPak Binocular Case GlassPak Case Harness Comfort Neck Strap Tethered Objective Lens Covers Rainguard Eyepiece Cover Lens Cloth Features: ArmorTek: Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil, and dirt Multi-Coated: Fully multi-coated HD Lens Elements: HD Phase Correction: Coating on roof of prism models enhances resolution and contrast Rubber Armor: Provides a secure, non-slip grip, and durable external protection Shockproof: Rugged construction withstands recoil and impact