The Firefield Siege 10x50 Monocular gets you up close and personal with 10X magnification and a robust 50mm objective lens designed for incredible light transmission and a crystal clear field of view even when dusk sets in. With IP67 waterproof protection and a rubber armored body, the Siege is ready for outdoor action no matter how tough the adventure. This BAK4, roof prism Firefield Siege 10x50 Monocular is compact enough to fit easily in a cargo pocket or backpack but delivers big enough on performance, with standard ¼-20 screw mount compatibility, to be your on-the-go spotting scope. Additional features include a field of view of 367 ft. at 1,000 yards, twist-up eyecup and an internal focusing lens. The Firefield Siege 10x50 Monocular includes lens covers, a carrying case, a lens cloth and a protective carrying case.