The Vortex Viper HD 15-45x65 is a high-quality, versatile spotting scope known for its clear image quality and rugged construction. It offers a zoom range from 15x to 45x, allowing for close-up views of distant objects. The 65mm objective lens gathers ample light for bright, sharp images, even in low-light conditions. The scope features a high-density (HD) extra-low dispersion (ED) glass optical system, which minimizes chromatic and spherical aberrations, resulting in improved contrast and color fidelity. It also boasts Vortex's XR fully multi-coated lenses, which further enhance light transmission. The Viper HD is also built to withstand harsh conditions, with a waterproof, fogproof, and ArmorTek coating that protects against scratches, oil, and dirt.