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Leica DM 500, DM500 B Manual 31
Viewing Tube Adjustment (cont.)
If you are comfortable wearing your
corrective lenses (contact lenses or
eyeglasses) for microscope viewing, leave them
on and your adjustments will be minimal.
2. Focus on the specimen using the fine
adjustment knob of the microscope while
looking only through one of the eyepieces
(if you have one focusable and one non-
focusable eyepiece, look through the non-
focusable eyepiece at this time). To help
focus, cover or close the other eye.
3. Now switch to look only through the other
eyepiece (focusing eyepiece) with your
other eye. This time, focus the specimen by
using the focusing capability in the focus-
ing eyepiece.
•
Do not raise or lower the stage to focus.
4. Grip the knurl on the focusing eyepiece
with one hand and rotate the top of the
eyepiece with the other hand until the
specimen is in focus with this eye and this
focusing eyepiece. This corrects for any
vision differences between your right eye
and left eye.
5. Now switch to a high magnification objec-
tive (not an oil objective) and focus the
microscope while viewing with both eyes.
The higher magnifications have a shal-
lower depth of field. Therefore, after
focusing with a high magnification, you will
find that when you change to lower magnifi-
cations, you only have to adjust the fine focus
slightly, if at all.