GPO USA 8x42 Passion ED Binoculars offer high-performance optics to assist your viewing, even in the lowest light conditions. Sacrificing a little magnification creates better low-light performance via an exit pupil beam 20 percent larger than 10x models. These binoculars deliver high transmission of 99.7 percent of the available light through every lens surface, and the wide exit pupil of 5.25mm provides a bright image, even at dusk and dawn. All PASSION HD binoculars feature high-resolution, high-transmission optics and carry a limited lifetime warranty.