Leupold BX-4 Pro Guide HD 10x50mm Roof Sitka Open Country 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. Features: 100% Waterproof and Fogproof - Absolute waterproof and fogproof integrity each is ready for a lifetime in the field, in all conditions BAK 4 Prisms - Delivers a perfectly round exit pupil with virtually no edge distortion and a crisp, clear image Ergonomic design ensures these products are slim, lightweight, and fit well in your hands no matter what size they are Fully multi-coated lens system ensures maximum brightness for clarity, contrast, and color fidelity High-definition, calcium-fluoride lenses ensure incredible clarity at all magnification levels Open bridge, roof prism design is extremely lightweight and ergonomic Phase coated roof prisms significantly increase resolution for a sharp sight picture from edge-to-edge of the visual field 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 Twist-up eyecups and generous eye relief for comfortable extended viewing