Vortex Optics Hurricane Binoculars XR Fully Multi-Coated: Proprietary coatings increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. Porro Prism: Valued for a rich depth of field, wide field of view, and three-dimensional image. ArmorTek: Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt. Adjustable Eyecups: Fold up and down for comfortable viewing with or without eyeglasses. Individual Focus: Ensures eyepieces are specifically tuned to each eye for ultrasharp, customized views. Field of View: 341 feet/1000 yards|6.5 degrees Close Focus: 30 feet