Built on a lightweight and strong magnesium chassis, the Bushnell Engage binocular line is designed to withstand not only the elements, but hard use. ED Prime glass and EXO Barrier lens coating technology gives users sharp, high-contrast images while repelling water and debris. The roof-prism 8X 42 mm optic is also O-ring-sealed and nitrogen-purged for weatherproofing. Additionally, Bushnell added a locking-eyepiece diopter to ensure focus does not change while trekking the backcountry or bouncing around a vehicle. The Engage series is covered under a limited lifetime warranty. Price: $350. Contact: Bushnell Outdoor Products; (800) 423-3537; bushnell.com.