Fein
8
Microscope Operation
Adjust the Focusing Tension:
If it becomes hard to move the coarse focus
knob, or the stage drifts and the sample falls
out of focus the tension needs to be adjusted.
Tighten the tension by adjusting the tension
adjustment ring (1) in the direction of the
arrow shown at right. Loosen the tension by
rotating the tension adjustment ring in the
opposite direction.
Adjusting the Interpupillary Distance:
When observing with both eyes, adjust
the eyepieces (2) to fit your personal
interpupillary distance. The scale between
the eyepieces (1) notes the interpupillary
distance setting. It’s a good idea to note
this number when working in a setting
where multiple people are using the same
instrument. This allows you to easily reset
your interpupillary distance.
1
Aperture Diaphragm:
The aperture diaphragm dictates the
numerical aperture (NA) of the illumination.
The best resolution, contrast, and depth
of field is obtained when the NA of the
illumination matches with the NA of the
objective. Rotate the diaphragm adjustment
ring (1) so the pointer matches up with the
inscription of the objective being used.
1
1
2
1
2
