Pentex 8-16x21 UP Zoom Series Binoculars (Black)Pentax quality and clarity are within reach, at a price thats within reach, too. The compact porro prism 8 16x21 UP Zoom Series Binoculars from Pentex feature a dual axis, single body design with synchronized eyepiece adjustment. Its aspherical lens elements give you edge to edge sharpness. Fully multi coated optics ensures maximum light transmission resulting in high quality viewing. Every surface of every element is fully coated minimizing internal