The Kaibab HD 18x56 is the ultimate long-distance western-hunting binocular series. When serious patience and superior optics are required to locate trophy animals at extreme distances, the Kaibab HD delivers the premium-quality, high-magnification optical performance you need to get the job done. Intended to be used with a tripod for extended, comfortable, rock-steady viewing. Ultracomfortable twist-up eyecups are perfect for long glassing sessions. Visually tear apart open landscapes in pursuit of tough-to-locate trophy big game with the Kaibab HD. Product Features APO System HD Lens Elements XR Plus Fully Multi-Coated Dielectric Prism Coatings Plasma Tech Phase Correction Roof Prism Waterproof Fogproof ArmorTek Rubber Armor 56 mm Lenses Multi-Position Eyecups Center Focus Wheel Locking Diopter Tripod Adaptable Product Specifications Magnification: 18 x Objective Lens Diameter: 56 mm Eye Relief: 16.4 mm Exit Pupil: 3.1 mm Linear Field of View: 194 feet/1000 yards Close Focus: 23 feet Interpupillary Distance: 60-76 mm Height: 7.7 inches Width: 5.7 inches Weight: 43.5 ounces