Celestron's mid-size Outland X series was designed to meet the needs of every outdoor enthusiast. Multi-coated optics and BaK-4 prisms provide for high resolution, high contrast views with enhanced color fidelity.The waterproof, rubber armored Outland X allows for rough handling and use in all weather conditions. Large focus knobs help you bring your subject into sharp focus quickly, while twist-up eyecups allow for easy adjustment of eye relief for eyeglass wearers.