Class-leading roof prism binoculars with superior ergonomics, 42 mm objective lens and 8x magnification. Nikon's ED (Extra-Low Dispersion) glass lenses, dielectric high-reflective multilayer prism coating and advanced multilayer lens coating combine to deliver superior light transmission and clear, high-resolution images with superb contrast, even in low-light. Field curvature is minimized by the field flattener lens system that ensures a superior image all the way to the lens periphery. The large, easy to use focus knob covers the diopter adjuster, which helps prevent unintentional changes to the diopter setting. Extremely portable and highly durable, these waterproof and fog-free binoculars are ideal for trekking and nature watching.