10x binoculars may be the Jack of all trades when it comes to glassing. With enough magnification for long-range identification the 10x42mm and 10x50mm BX®-4 Pro Guide™ HD binos will also get the job done in tight situations; all while being compact and lightweight. Built around our Twilight Max HD Light Management System the BX®-4 Pro Guide™ HD binoculars boast un-paralleled brightness edge-to-edge clarity and advanced glare management elements; helping you see more detail in less light. Their ergonomic open-bridge design is comfortable for extended glassing sessions and delivers key weight savings for those long backcountry adventures. - 100% Waterproof and Fogproof - BAK 4 Prisms - Ergonomic Design - Fully Multi-coated Lens System - High Definition - Open Bridge Roof Prism Design - Phase Coated - Twilight Max HD Light Management System - Twist Up Eyecups - Interpupillary Distance Range: 58-74 - Weight (oz): 28 - Linear FOV (ft/1000 yd) - High: 299 - Length (in): 6.6 - Eye Relief (mm) - High: 18.8 - Angular FOV (degrees) - High: 5.7 - Exit Pupil (mm) - High: 5 - Close Focus Distance (ft): 10