Microscope Parts and Their Uses

Front

Eyepiece (Ocular Lens)

Back

Magnifies the image, usually 10x.

Front

Objective Lenses

Back

Primary magnification: 4x, 10x, 40x

Front

Stage

Back

Platform for slide placement

Front

Coarse Focus Knob

Back

Large adjustments to focus

Front

Fine Focus Knob

Back

Small adjustments to focus

Front

Light Source

Back

Illuminates specimen

Front

Diaphragm

Back

Controls light intensity

Front

Arm

Back

Supports the tube and connects to the base

Front

Base

Back

Supports the microscope structure

Front

Revolving Nosepiece

Back

Holds and rotates objective lenses.