Swarovski 20-60mm Variable Angle Eye Peice Designed to work with ATS, STS, and STR models, Swarovskis newest eyepiece designs are rugged, lightweight and brilliant performers meant for a lifetime of faithful service. Helicoid-type eyecup designs accommodate those with and without eyeglasses alike. Key FeaturesSwarotop lens coatings for increased color fidelity over the entire spectrum Broad, extendable eyecup Specifications: Swarovski 20X to 60X Zoom Eyepiece 49430