Mikroskop Primostar 3, Fix-K., Bi, SF20, 4 Pos., D=0, ABBE 0.9, 40x-1000x

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.

Describes the optical design of the lens.

The light source illuminates the object and is available in various forms.

A focusing wheel is used to focus the microscope on the particular object.

Used to hold colour filters for contrast enhancement.