3
2.2 Operation of the field diaphragm
The field diaphragm has been pre-centered and is ready to use, but due to possible vibration or
inclination during transport it may deviate, therefore always double check.
If it is not pre-centered, then please follow the following steps:
1. Use objective 10x.
2. Push in the field diaphragm switch (the one in the front, fig. 3 number 1), a light spot will be
visible in the field of view .
3. Adjust the centering if the light spot deviates from the center of the view of view (fig. 3
image a) by using the adjustment screws behind the filed diaphragm switch (fig. 3 number
2). The light spot should be centered as shown in fig. 3 image b.
4. Pull out the switch so that the image fills the field of view as shown in fig. 3 image c.
Fig. 3
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