Everything About Microscope Eyepieces

If you're wondering about the function of a microscope's eyepiece, you've come to the right place! The eyepiece is a part of the optical system that magnifies the object you are trying to view. The eyepiece and objective are the two main parts of a microscope's optical system. In this article, we review everything you need to know about microscope eyepieces.

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In this article, we cover the following questions:

What is the eyepiece of a microscope?
Does light enter the eyepiece first in the microscope?
What does the eyepiece do on a microscope?
What does the ocular lens do on a microscope?
What does "WF" mean on an eyepiece?
What is the magnification of the eyepiece?
How can you find the eyepiece field number (FN)?
What is the field of view on a microscope?
What does the number of mm (for example, 30 mm) mean on an eyepiece?
What is the eye relief of an eyepiece?
How do you clean microscope eyepiece lenses?
How do you adjust microscope eyepieces?

Updated on: 07/03/2025