The Microscope
Lighting attitudes after A. Koehler
Open the luminous-field diaphragm
Open the luminous-field diaphragm as far as it will go. The spot of light on the paper is now at its maximum diameter.
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Luminous source
Luminous-field diaphragm
Aperture diaphragm
Condenser height
Interpupillary distance
Sharpness
Condenser
Centering screws
Contrast
Change eyepiece