From the Manufacturer:. PASSION HD products represent the absolute premium class from GPO.. HD optics design combined with state-of-the-art multi-layer coatings creates optical excellence in transmission, field of view, edge-to-edge sharpness, close focus and color rendition.. Thanks to our PASSIONdrop water-repellent coating, all optics are dirt and water resistant.. The innovative micro bridge offers high quality and a very ergonomic design. The magnesium housing, coated magnesium bridge and aluminum rotating eyecups offer maximum robustness with minimum weight.. The diopter adjustment has been integrated into the central focusing wheel to ensure comfortable handling. If you do not want to compromise on the quality of your binoculars and are looking for an extremely fair price-performance ratio, you will find it here.