PERRINI 60x50 Day/Night Prism Black and Green Military Binoculars with Pouch 60x50 Power Binoculars Fully coated lenses for maximum light transmission and optimum brightness Extra-low dispersion glass corrects chromatic aberration that causes color fringing and realizes a contrast-rich and high-resolution image Sharp, clear images to the lens periphery, thanks to our exclusive field flattener lens and eyepiece design Fully coated lenses for maximum light transmission and optimum brightness