Ngokuvamile, lapho sikhuluma ngenkomba ye-resin lens, isuka ku-1.49 – 1.56 – 1.61 – 1.67 – 1.71 – 1.74. Ngakho-ke amandla afanayo, i-1.74 yi-thinnest, amandla aphezulu, umphumela osobala kakhulu.