Lightweight pocket size for long and comfortable nature observation; 90% light transmission; Light and robust magnesium housing; Ultra-HD Concept gives maximum detail visibility and color fidelity thanks to optimizations in coating and optical design; Zeiss FieldFlattener Technology with extreme edge sharpness, even at wide fields of view; T* Multi-layer coating for sharp and high-contrast viewing; LotuTec Coating makes lenses dirt-repellent and extremely easy-to-clean; At only 16.2 oz, the lightest binoculars in their class