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Focusing on the object
• Set the desired objective. For this purpose,
lower the objective nosepiece first. Use the
black knurled grip on the nosepiece to move
the objective into the light path. Make sure
that the nosepiece clicks audibly in place.
• Use the coarse and fine adjustment to focus
on the object; this will vary the height of the
objective nosepiece while the stage level will
remain the same. The overall travel is 7 mm.
The focusing range (in air) is from 1.0 mm
below to 6 mm above the stage surface.
Attention!
Depending on the objective used, the objec-
tive nosepiece must be lowered before
changing the objective position. Otherwise
the objective may collide with the stage.
Adjusting tubes and eyepieces
If you wear glasses, you should remove or fold
back the glare protection on the eyepieces but
make sure to put it on if you are not wearing
glasses.
• Set your interpupillary distance by pulling the
eyepiece tubes apart or pulling them closer
together until you see a single superimposed
image instead of a double image.
• Note your personal interpupillary distance.
• Additional procedure for ergo tubes: Set the
viewing angle (0° –35°) by tilting the binocular
viewing port. To avoid fatigue symptoms, vary
the viewing angle from time to time.
• Close any unused tube exits as stray light may
otherwise disturb viewing.
DM ILB binocular tube
Only for eyepieces with graticule* inserted:
• Largely defocus the object or remove it from
the beam path.
• Focus the graticule with the eye relaxed by
adjusting the eyelens. (The eye relaxes most if
you look temporarily at a distant object
outside the frame.)
• Focus the object only through the eyepiece
with the graticule.
• Then close the eye and focus the object by
adjusting the second eyepiece only.
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