Equipped with flat-field, distortion free, high resolution optics for sharp edge-to-edge clarity; BaK4 prisms with broadband fully multi-coated optics offering increased brightness and reflective performance over 90%; and all metal construction for strength and durability. The ribbed rubber armor provides sure-grip in all weather conditions while the sealed O-ring and dry nitrogen purged make this series 100% waterproof and fogproof. Featuring a built-in vertical and horizontal reticle to assist in measuring distances. All Swift Marine binoculars come complete with a neoprene neck strap, rainguard and flip-down rubber objective lens covers, microfiber lens cloth, tri-pod mount and water-resistant padded carry case. Features: Built-in Reticle • All Metal Construction • Bak4 Prisms • Fully Multi-coated Optics • Individual Focus System • Dry Nitrogen Purged • Waterproof, Fogproof and Shock Proof • Swift Premier Twenty Five Year Warranty Specifications: Prism Type Porro, 7x50 • Objective Diameter 50mm • Field of View @ 1000 Yds/m 393ft/131m • Weight 57oz/1620g • Close Focus Under 16.4ft/5m • Eye Relief 23mm • Prisms Bak4 • Lens Coating Fully Multi-coated • Interpupillary 56-74mm • Armored Ribbed Rubber Armor • Eyecups Retractable Rubber • Waterproof Yes