The pinnacle of clarity and color definition. The Cronus G2 20-60x86 features dual layers of ED glass to eliminate chromatic aberrations, providing the sharpest detail in Athlon&';s spotting scope line-up. A convenient dual focusing system provides a quick coarse focus, while fine focus adjustment makes hitting peak focus a breeze. APOCHROMATIC LENS SYSTEMHelps in converging refracting colors into one focus point, producing greater contrast, sharpness, and color definition. UHD GLASSGives you an advantage with an image that has little or no chromatic fringe for the clearest and sharpest image. XPL PROTECTIVE COATINGA protective coating that gives you extra protection on the exterior lenses to prevent the scope from enduring dirt, oil, and potential scratches.