The Leupold® Golden Ring® 20-60x80mm Boone and Crockett HD™ spotting scope is a special edition that combines our legendary ruggedness, 100 percent waterproofing, and the superior optical quality of lead-free glass lenses uses high-definition™, calcium-fluoride lenses and the Leupold exclusive Index Matched Lens System® to achieve a level of clarity at high power that’s never before been achieved.