> ## Knowledge Base Index
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> Use this file to discover available pages before exploring further.
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# Everything About Microscope Objectives

*Microscope objective lenses are a critical part of the optical system of any compound microscope. The two main parts of the optical system of a microscope are the eyepiece and objective lens (sometimes just referred to as the "objective"). In this article, we review everything you need to know about microscope objectives.*

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

In this article, we cover the following questions:

* What is an objective lens turret?
* What do the numbers on an objective lens mean?
* What are the colors on an objective lens?
* What does "parfocal" mean?
* What does "paracentric" mean?
* What are the different types of objectives?