The Vanguard Endeavor HD 82A Spotting Scope delivers bright, clear, high-contrast images even in low-light conditions. The Vanguard Endeavor HD 82A Waterproof & Fogproof Spotting Scope is 100-percent waterproof and fogproof with extremely high-resolution, fully multi-coated lenses and a BaK4 prism. Endeavor's durable-yet-lightweight, magnesium construction features rubber armor for shock resistance and a sunshield, so it can be used in any kind of setting. The Vanguard Endeavor HD 82A Spotting Scope w/ BaK4 Prism features a dual focus wheel system enables fast and fine-tuning focus adjustment. Capture breathtaking, close-up images by using Endeavor's easy-to-attach digital camera adaptor for digiscoping, and simply a great alternative to purchasing expensive interchangeable telephoto lenses.