Eyepiece lens: the lens at the top that you look through. They are usually 10X OR15X
Tube: connects the eyepiece to the objective lenses
Arm : supports the tube and connects it to the base
Base : the bottom of the microscope, used for supports
Illuminator: a steady light source used in place of a mirror. If your microscope has a mirror, it is used to reflect light from an external light source up through the bottom of the stage.
Stage: the flat platform where you place your slides. Stage clips hold the slides in place. If your microscope has a mechanical stage, you will be able to move the slide around by turning two knob one moves it left and right ,the other moves it up and down.
Revolving: this is the parts that holds two or more objective lenses and can rotated
To easily to change power.
And there are so many objective
Objective lense