Microscopic Comparison

Ensure that stereo and comparison microscopes meet all maintenance and calibration standards.
Select an appropriate level of magnification for both objective lenses of the comparison microscope. Typically, this setting will be 1x or 2x. Ensure that the objective lenses are locked in place.
Select the appropriate level of magnification for both ocular lenses. This would typically be 10x.
Select the same type and orientation of light source for each comparison microscope stage. Many examiners prefer strong fluorescent or fiber-optic lighting.