Designed for the nature-enthusiast who wants to pack light without sacrificing image quality, the Pentax 10x36 A-Series AD WP Compact Binoculars deliver bright clear images while weighing in at just 22.5 ounces. The BAK4 roof prisms are phase-corrected to improve image contrast and enhance color rendition. All of the optics are anti-reflection fully multicoated to maximize light transmission to produce the brightest views possible.