10X 12X 15X Jewelers Watchmakers Eye Loupes Magnifiers. This is a new set of 3 plastic eye loupes. These pocket size loupes have distortion free lenses. The shape of these loupes allows each to rest comfortably in the eye socket. You receive: One 10X loupe with a 1" (25 mm) focal distance. One 12X loupe with a 7/8" (22 mm) focal distance. One 15X loupe with a 3/4" (19 mm) focal distance.