The Porro prism binoculars of the S series feature an objective lens diameter greater than 40 mm and are the continuation of the A series. With the same high-quality coatings as the A series, impeccable image quality is guaranteed. A characteristic of this series is the high light intensity due to the large objective lens diameter. The S series offers many of the features found in more expensive binoculars. They are robust with a full rubber housing, including an extra-large central focus wheel. They provide exceptional optical performance with high-quality BaK4 prisms. Multi-coated on all lenses, aluminum die-cast housing, enhanced light transmission coating, complete rubber armoring, large central focusing wheel, and click-stop diopter adjustment.