Zeiss Stemi 508 Operating Manual - page 27
Stereo microscope
OPERATION
ZEISS
Stemi 508
Adjusting the stereo microscope
06/2015
435064-7044-010
25
Engl
is
h
4
OPERATION
4.1
Adjusting the stereo microscope
The stereo microscope has been connected and
switched ON.
1.
Place specimen (Fig. 14/7) centrally on the
glass or plastic plate (Fig. 14/6) and illuminate
it (Fig. 14/5).
The functionality of the knob for the
reflected-light illuminator has been
described in Section
2.
Set diopter compensation on the adjustable
eyepieces (Fig. 14/1) to "0".
"0" on white dot (without eyepiece
plate). "0" on red dot (with eyepiece
plate), see Fig. 15.
Check that the eyepieces are inserted
into the tube to their stop.
3.
Set individual eye distance by shifting the
eyepiece tube laterally (Fig. 14/2), until only
one complete light circle (specimen field) is
visible when looking into the eyepieces with
both eyes.
To this effect, a distance of approx.
2 cm must be maintained between the
eye and the eyepiece.
4.
Initially, set the zoom (Fig. 14/3) to the
smallest magnification.
5.
Focus on a small distinct detail in the center of
the specimen (Fig. 14/4).
6.
Adjust maximum zoom value (Fig. 14/3). Magnification will probably make the distinct detail appear
blurred and no longer in the image center.
7.
Sharpen the specimen by focusing, then shift the specimen to re-search for the detail and focus
"sharply" again (Fig. 14/4).
8.
Afterwards, reset to the lowest zoom value and correct any image blurring for each eye separately by
diopter compensation on the adjustable eyepieces (not on the focusing knob, Fig. 14/4)
(compensation of visual defect).
Once the stereo microscope has been adjusted in this way, the image focus remains unchanged over the
entire zoom range. This can be verified by increasing or reducing the zoom value.
After change of the observer, repeat steps 3. to 8.
Fig. 14 Adjusting the stereo microscope
Fig. 15 Adjusting the eyepieces