Light source and diaphragm.
The diaphragm is the opening like and iris in the stage. It can be made large and small like the pupils of the eye.
The objective lens helps adjust the brightness of an image.
Objective Lens.
the objective lens
Brightness can be changed by changing the voltage to the lamp and adjusting the condenser and diaphragm/pinhole apertures.
adjust eyepiece
The objective lens helps adjust the brightness of an image.
Objective Lens.
Objective Lens.
Objective Lens.
Objective Lens.
the objective lens
Brightness can be changed by changing the voltage to the lamp and adjusting the condenser and diaphragm/pinhole apertures.
adjust eyepiece
zoom
An iris diaphragm controls the amount of light admitted to a lens. Closing the iris diaphragm will decrease the brightness and increase the contrast of an image.
Adjust the coarse focus as best as possible and then adjust the fine focus knob til it looks really good
The ocular lense adjustment allows the image from the microscope to be precisely focused on the retina of the viewer's eye.