OPTIKA MICROSCOPES B-500DK Manual De Instrucciones página 14

4.0 B-500DK DARKFIELD MICROSCOPE CONFIGURATION
• The 100X objective has an internal iris diaphragm designed to allow adjustment of the nume-
rical aperture. It should be adjusted at this time.
Remove the eyepiece and place the centering telescope into the eye tube to observe the rear
focal plane of the objective. If a bright ring of light is seen around a central dark region, the
aperture of the objective is too great and must be reduced using the internal iris diaphragm.
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OIL
(SLIDE-OBJECTIVE)
OIL
(CONDENSER – SLIDE)
ROTATE THIS TO
ADJUST THE
INTERNAL IRIS