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.

You can read the full article [here](https://carson.com/optics-university/microscope-hub/everything-about-microscope-eyepieces/).

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