27
GX53
Slide the BF/DF selection lever to set to the BF side.
Rotate the revolving nosepiece to engage the 10X objective in the light
path and place the sample on the stage to bring it into focus approximately.
1
2
a
b
3-11 Adjusting the field diaphragm (FS)
Field diaphragm image
Field of view of the
eyepiece
A
B
C
D
Pull the field diaphragm lever a to narrow down the field diaphragm
to within the field of view. (Picture A)
Insert the Allen screwdriver into the FS centering screws b (2 pcs.)
and rotate each to adjust so that the field diaphragm image comes
to the center of the field. (Picture B)
While pushing in the field diaphragm lever a , open the field
diaphragm gradually until the field diaphragm image is inscribed in
the field of view. (Picture C)
If the center of the field diaphragm image is deviated, perform the
centering again.
Open the field diaphragm until the field diaphragm image becomes
almost the same size (circumscribed) as the field of view. (Picture D)
In case of reflected light darkfield observation, push in the
field diaphragm lever
a
to fully open the field diaphragm.
If the field diaphragm is not fully opened, the observed
image becomes dark and the darkfield observation may
not be available..
3
4
5
6
NOTE
