The roof lantern binoculars of the S series have an objective lens diameter greater than 40 mm. Equipped with the same high-quality A-range coatings, impeccable image quality is guaranteed. Characteristic of this series is the high light intensity due to the large objective lens diameter. Multiple compensation on all lenses; Enhanced Light Transmission Compensation; Phase correction; Internal focusing; Water-repellent coating of the outer lenses; Waterproof (JIS 6 classification) with nitrogen filling; Nitrogen filling; Continuous rubber reinforcement for protection and secure hold;