Burris Signature HD Features The Burris Signature HD Binoculars are built around a HD roof prism optical system using Bak-4 glass with phase correct dielectric coating delivering precise resolution and true color rendition across the 15x magnification range. A 56mm objective lens gathers substantial light supporting a 3.7mm exit pupil that keeps the image bright even as daylight fades. Close focus down to 23 feet allows detailed observation of nearer subjects without switching optics while the fast focus system lets users quickly dial in sharpness on moving targets. An interpupillary distance range of 60mm to 75mm accommodates a wide range of users and adjustable aluminum eyecups let eyeglass wearers dial in proper eye relief at 0.7 inches. Construction is shockproof and nitrogen filled keeping the optics waterproof to a depth of one meter and fog free in changing weather and temperature conditions. Durable rubber armor covers the exterior for a secure no-slip grip along with added protection against impact and rough handling in the field. At 40 ounces and measuring 8.2 by 5.7 by 2.5 inches the binoculars balance solid glass performance with a manageable carrying weight. A tripod adapter mount supports steady extended glassing sessions and the included cushioned neoprene neck strap along with a carrying case round out a complete package for hunters spending long days in the field. Burris Signature HD Specifications Manufacturer: Burris Model: Signature HD Type: Binocular Color: Green Material: Rubber Armor Magnification: 15x Objective: 56 mm Focus System: Fast Focus / Center Wheel Prism Glass: BAK-4 Close Focus: 23 ft Exit Pupil: 3.7 mm Eye Relief: 0.7 Interpupillary Distance: 60-75 mm Eyecups: Adjustable Aluminum Diopter Adjustment: -5 to +5 Waterproof: Yes to 1M Nitrogen Filled: Yes Shockproof: Yes Tripod Adaptable: Yes Weight: 40 oz Dimensions: 8.2 x 5.7 x 2.5 Neck Strap: Yes Carry Case: Yes Available At: GrabAGun