Under the umbrella of Celestron's award-winning binoculars, the 8x42 Nature Dx Ed Roof Prism Binocular stands out with its advanced Ed objective lenses. This high-performing optical device competes with pricier binoculars, offering superior quality within an affordable range. This versatile binocular is your perfect companion for a variety of activities, from nature observation and bird watching to sports events, providing a detailed, close-up view of the action.The Nature Dx Ed's Ed glass is designed to help you spot the most subtle field markings with a close focus of just 6.5 feet. The Extra-Low Dispersion (ED) glass virtually eliminates chromatic aberration, a common visual defect in binoculars, delivering razor-sharp images even at the field of view's edges. Celestron's high-quality ED glass is known for producing images with outstanding, true-to-life color, offering visibly brighter, sharper images compared to non-ed binoculars.