Objective iPlan Achromat, PrimoStar 3, D=0 50x/1.0,incl. oil, wd=0.27mm

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.

Here you will find microscopes that are suitable for a variety of classroom settings.