The Z series features the top products from the PENTAX Sport Optics range. This series consists exclusively of premium-quality roof prism binoculars that catch the eye of even the most critical observers. All binoculars in this series are manufactured in Japan. The ED series includes ED lenses along with an additional dielectric coating. This enhances color brilliance and fidelity to an extraordinary level, appealing especially to the most demanding users and dedicated observers. All lenses have multiple coatings, Enhanced Light Transmission coating, phase correction, water-repellent coating on the outer lenses, are waterproof (JIS 6 classification) with nitrogen filling, and feature a continuous rubber armor for protection and secure grip.