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2) Raise the condenser when using high power objectives and lower it when using low
power objectives.
Note:
The centering of the condenser and the light axis of the objective are factory
adjusted. Do not attempt re-adjustment.
The highest position of the condenser has been factory adjusted. Do not attempt
re-adjustment.
3.7 Adjusting aperture iris diaphragm
Move the iris diaphragm lever left or right to adjust the aperture size.
Note:
The iris diaphragm is designed to adjust the aperture size,
not to adjust brightness. Generally, opening the diaphragm to
70-80% of the N.A. value of the respective objective will
provide an image of acceptable quality. If you want to
observe the image of the iris diaphragm, remove one
eyepiece and look through the tube. You will see a dark circle
encroaching on the bottom of the tube.
3.8 Adjusting focus tension
The focus tension has been pre-set at the factory. If the mechanical stage drops by
itself, rotate the tension adjustment ring situated between the coarse focus knob and
microscope body on the power switch side until the tension is in maintained.
Iris Diaphragm
Lever
