The Porro prism binoculars of the S-Series feature an objective lens diameter greater than 40 mm and are a continuation of the A-Series. With the same high-quality coatings as the A-Series, flawless 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 focusing wheel. They provide exceptional optical performance with high-quality BaK4 prisms. Multi-coating on all lenses, aluminum die-cast housing, Enhanced Light Transmission coating, complete rubber armoring, large central adjustment wheel, and click-stop diopter adjustment.