Barska Colorado 10-30x60mm Zoom Binoculars CO11338 is a highly versatile pair of binoculars that will give you pristine mid- to long-range viewing with smooth focusing image capabilities, powerful optics, and a rugged body. These Barska binoculars, equipped with a reverse porro prism system, feature a wide magnification range from 10x to 30x, allowing you to view distant objects and nearby vistas with the same high-definition clarity. Fully coated optics combine with the BK-7 reverse porro prism to make these binoculars excellent for low-light conditions, giving you optimum brightness at all hours of the day.