10x binoculars may be the Jack of all trades when it comes to glassing. With enough magnification for long-range identification, the 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. Twilight Max HD Light Management System Resolve finer details at longer ranges in the widest range of weather and lighting conditions throughout the day. Engineered to be the industry standard of performance, the Twilight Max HD Light Management System combines exceptional light transmission and glare management to provide vivid, bright, high contrast images from dawn until dusk. BAK 4 Prisms Delivers a perfectly round exit pupil with virtually no edge distortion and a crisp, clear image. Details - Interpupillary Distance Range: 58-74 mm - Weight: 28 oz/793 g - Linear FOV (ft/1000 yd): 299 - Linear FOV (m/1000 m): 100 - Length: 168 mm - Eye Relief (mm): 18.8 mm - Angular FOV (degrees): 5.7 - Exit Pupil: 5 mm - Close Focus Distance: 10 ft/3 m.