Tasco's Essentials Porro Binoculars are ideal for birding, hiking, travel, or even star gazing. The porro prism design, large 50mm objective lenses and multiple lens coatings all provide a bright and clear image with great contrast in all viewing conditions. The rugged housing is also outfitted with rubber armor for shock resistance and a no-slip grip. Features of the Tasco Essentials Porro Binoculars: Available in multiple magnification ranges Porro prism optical system Rubber armor coating Tasco Essentials 16x50 Black Full Size Porro Binocular 170165