MBL Series Microsocopes - Koehler illumination 

1. Insert the condenser
- Open the aperture diaphragm completely
- Turn the condenser as far up as possible
- Adjust the brightness to a comfortable level
- Focus the image
- Close the field diaphragm
- Move the condenser up and down until the illuminated ring is in focus
- Move the illuminated ring to rhe center of the field of view by turning the condenser adjustment screws
INFO: Field of view
- Open the field diaphragm until the field of view is jts completely covered
- Set the value of the aperture diaphragm to the value of the objective used, e.g. 10x
- Turn the aperture diaphragm until you have found the best subjective position for resolution, contrast and depth of field
INFO: The microscope can now be used for examination of samples using the Koehler illumination method
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