The key parts of a microscope include the body tube, nose piece, objective lenses, stage clips, diaphragm, light source, ocular lens, arm, stage, coarse adjustment knob, fine adjustment knob, and base. The body tube holds the objective lenses and ocular lens. The nose piece holds the objective lenses and can be turned to change magnification. The objective lenses provide magnification from 10x to 40x.

1. Microscope
Identifying the parts and
understanding their purpose

2. Parts of a Microscope
Body tube

3. Body Tube
• The body tube holds the objective
lenses and the ocular lens at the proper
distance

4. Parts of a Microscope
Nose Piece

5. Nose Piece
• The Nose Piece holds the objective
lenses and can be turned to increase
the magnification

6. Parts of a Microscope
Objective
Lenses (2)

7. Objective Lenses
• The Objective Lenses increase
magnification (usually from 10x to 40x)

8. Parts of a Microscope
Stage
Clips (2)

9. Stage Clips
• These 2 clips hold the slide/specimen in
place on the stage.

10. Parts of a Microscope
Diaphragm

11. Diaphragm
• The Diaphragm controls the amount of
light on the slide/specimen
Turn to let more light in or to
make dimmer.

12. Parts of a Microscope
Light Source

13. Light Source
• Projects light upwards through the
diaphragm, the specimen and the
lenses
• Some have lights, others have mirrors
where you must move the mirror to
reflect light

14. Parts of a Microscope
Ocular Lens

15. Ocular Lens/Eyepiece
• Magnifies the specimen image

16. Parts of a Microscope
Arm

17. Arm
• Used to support the microscope when
carried. Holds the body tube, nose
piece and objective lenses

18. Parts of a Microscope
Stage

19. Stage
• Supports the slide/specimen

20. Parts of a Microscope
Course Adjustment

21. Coarse Adjustment Knob
• Moves the stage up and down (quickly)
for focusing your image

22. Parts of a Microscope
Fine Adjustment

23. Fine Adjustment Knob
• This knob moves the stage SLIGHTLY
to sharpen the image

24. Parts of a Microscope
Base

25. Base
• Supports the microscope

26. Parts of a Microscope
Ocular Lens
Body Tube
Nose Piece
Arm
Objective
Lens (2)
Stage
Stage
Clips (2) Course Adjustment
Diaphragm Fine Adjustment
Light Source
Base