GPO Passion 8.5x50HD BinocularGPO Passion 8. 5x50HD Binoculars deliver about 40% more light than their 8x42 model due to increase objective lens diameter. As with the 42mm models, they feature Double HD objective lenses, which are extra low dispersion lenses that are chemically laminated to create a single multi layer high performance lens. This process reduces surface light reflections, enhances resolution and color contrast, minimizing chromatic aberration. Combined with GPO's