<P> Condensers are located above the light source and under the sample in an upright microscope , and above the stage and below the light source in an inverted microscope . They act to gather light from the microscope 's light source and concentrate it into a cone of light that illuminates the specimen . The aperture and angle of the light cone must be adjusted ( via the size of the diaphragm ) for each different objective lens with different numerical apertures . </P>
where is the condenser located on a microscope
above the light source and under the sample in an upright microscope , and above the stage and below the light source in an inverted microscope