Description 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 A 1/4-20 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. Included in Package Lanyard Lens covers Carrying case Lens cloth Features Fully multi-coated optics Internal focusing Twist-up eyecup Built-in tripod adapter Waterproof and fogproof IP67 waterproof rating BAK-4 glass prism 10x magnification EXPORT CONTROL NOTICE: This product is controlled for export and in-country transfer under the Export Administration Regulations (EAR). division contrary to U.S. law prohibited. Specifications Magnification 10 Diameter, Objective Lens (mm) 50 Type of Prism (type) Roof/BAK4 Prism Coating, (yes/no) Yes Lens Coating Fully multi-coated Focusing Lens, Eye/Obj/Int Internal Diameter, Exit Pupil 5.6 Eye relief (in/mm) .6/15.4 Field of View, degree 7 Field of View (ft/1,000yds) 367 Field of View (m/1,000m) 122 Close Focus Distance 13/4 Relative Brightness 22.4 Twilight Index 31.4 Resolution 2.3 Range, Diopter 0 Waterproof/Nitrogen-filled Yes Fog Proof Yes IP Rating (waterproof) IP67-waterproof up to 1m/3ft for 1 hour Eyecup system Twist-up Body Material Plastic/rubber Length (in/mm) 6.2/157 Width (in/mm) 2.2/56 Height (in/mm) 2.6/66 Weight, oz 15.2 Operating temperature, F/C 0 to 120 / -17 to 49