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ADJUSTMENT & OPERATION
Fig. 21
Fig. 22
Fig. 23
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ACCU-SCOPE
②
①
①
73 Mall Drive, Commack, NY 11725 • 631-864-1000 • www.accu-scope.com
EXC-400 MICROSCOPE SERIES
(continued)
Adjusting the Field Iris Diaphragm –
(Fig. 20, C)
By limiting the diameter of the light entering the
condenser, the field iris diaphragm can prevent other
light and strengthen the image contrast. When the image
of the diaphragm is just on the edge of the field of view,
the objective can show the best performance and obtain
the clearest image
Adjusting the Aperture Diaphragm –
(Fig. 21 & 22)
The aperture size is increased or decreased by rotating
the condenser aperture diaphragm ring ① (Fig. 21).
When the aperture is closed, the brightness and
resolution are decreased but the contrast and range of
focus are increased. If the aperture diaphragm is
opened, the brightness and resolution are increased;
however, the contrast and range of focus are diminished.
For optimal viewing conditions set the condenser
aperture diaphragm lever to match the magnification of
the objective ② in the optical path.
To confirm or as an alternative approach to adjusting the
aperture diaphragm position, remove one eyepiece and
look down the eyetube. The image will appear as in
Fig. 22. Adjust the aperture diaphragm until it is
approximately 70%-80% open. Replace the eyepiece
and continue with observation. The aperture diaphragm
position is different for each objective, so it is important
to repeat the adjustment procedure every time the
objective is changed.
Adjusting The Light Path - (Fig. 23)
The camera port on the trinocular viewing head allows
you to view 100% through the eyepieces, or 50/50% to
eyepiece/camera port.
To adjust the light path, push the Light Path Selector
Knob ① all the way in to observe 100% through the
eyepieces, or all the way out to observe through the
eyepieces and the camera port (50% / 50%)
15
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