10X42ED telescope using magnesium alloy mirror body, ED lens, plated waterproof membrane. Super ED lens for the most authentic color. Lens full-width green film, ED material lens, prism BAK4 silver + phase film, degree of visibility, parallax adjustment using composite design, fine-tuning easier! Focus more convenient! The optical performance of this product is almost perfect, is the first choice for professional optical enthusiasts, achromatic, real reduction was observed, allowing you to see a more clear, colorful world. Closer to each of the most exciting moment and your distance, all for unimaginable immersive.