Konus Konusrex 12x50 BinocularsThe Konus Konusrex 12x50 Binoculars feature some of the best optical glass that Konus has to offer. Fully multi coated lenses with an extra silver mirror coating can transmit up to 98% of incoming light that makes every image bright and vivid, even when lighting conditions are harsh or dim. The phase coated BaK 4 prisms ensure that everything you see through the binoculars is razor sharp and free of distortion. All of this quality glass is protected