Objective 20X / 0.60, wd 0.7mm, CCIS, PL APO, plan, apochrom., infinity, (BA410E)

This refers to the magnification factor of a single microscope lens. A lens with the number 40 is referred to as a scale of 1:40 or simply a factor of 40 times. If you multiply the lens factor by the eyepiece factor, you get the magnification.