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Eyepiece or Ocular

This is where you look into the microscope to see the image of the thing that you are looking for. It is the place where you put your eye.

Body Tube

This is the long, skinny tube that holds the eyepiece up above the microscope. It allows the light of the image to travel up from the objective lenses to the eyepiece.


Holds the two or three objective lenses. It rotates around in a circle, allowing you to chose which objective lense you want to use.

Objective Lenses: High, Medium, and Low

These are attached to the nosepiece and vary in size. The shortest lens is the least powerful and the longest lens is the most powerful. Often times people who make microscopes put different colored bands to identify the different powers.


This holds the upper portion of the microscope above the stage. This is also where you grab the microscope anytime you pick up the microscope.

Coarse Adjustment Knob

If you look to the top of the arm, there is a big round knob. This knob allows you to move the upper portion of the microscope up and down so that you can focus on the slide.

Fine Adjustment Knob

It is there so that you can fine tune the image.


The thin piece of glass that you place directly over the opening in the stage and is held in the place with the stage clips. This is where all of your specimens are mounted so that you can look at them.


This is where the specimens you want to look at are placed. It is the large flat area directly under the objective lenses that has a hole in the middle of it.

Stage Clips

These are the shiny clips that are on top of the stage. There should be one on either side of the hole in the middle of the stage. They hold the microscope slides in place


The hole in the miidle of the stage. This allows light to come up from behind whatever it is that you are looking at so that it is easier to see.


Check under the stage and you will find a round disk that has several different size holes in it. It allows you to change the amount of light that comes up through the aperture. If you experiment with the size of the opening, you will find that some objects are easier to see with less light and some need more.

Mirror or Lamp

One or the other of these is located between the legs of the base directly under the aperture. This shines light up through the aperture and also reflects light into the same space.


This holds the whole microscope up. It is usually two legs that are attached to the bottom of the arm.


Actually, they should be called feet, but these are two things that hold the microscope in place. Separately they are called ___ and together they are called the base.

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