C.
Interpupillary
Distance and
Diopter
Adjustments (Binocular tube)
(
(
1)
Hold
the knurled dovetail slides Q)
of
the
right
and
left
eyepiece tubes
with
both
hands and push the
tubes together,
or
pull them apart laterally, which-
ever
is
required,
while
looking
through
the
eyepieces
with
both
eyes,
until
perfect binocular vision
is
obtained (Fig.
21.
21
Rotate the tube length adjustment ring ®
on
the
right eyepiece tube
to
match
your
interpupillary
distance setting which
you
obtained
from
the scale
@.
3)
Look at the image
through
the
right
eyepiece
with
your
right eye and focus on the specimen
with
the
coarse and
fine
adjustment knobs.
Fig.2
4)
Next,
looking
at the image through the
left
eyepiece
with
your
left
eye
rotate
the tube
length adjustment ring
@
to
focus on
the
specimen
without
using the coarse and fine
adjustment knobs.
D. Tension
Adjustment
of
Coarse
Adjustment
Knobs
,
A tension adjustment ring
CD
is
provided
next
to
the
right hand coarse adjustment knob.
With
this device the
tension
of
the coarse adjustment
is
freely adjustable
for
either heavy
or
light
movement depending on operator
preference. However,
do
not
loosen the tension adjust-
ment ring
too
much, because this may
cause
thE~
stage
to
drop
or
the fine adjustment knobs
to
slip.
The
arrow
mark indicates increase
of
the tension.
*
Be
careful
not
to
rotate the
right
and
left
coarse adjust-
ment
knobs in the opposite directions simultaneously.
E.
Automatic
Pre·focusing Lever
This lever
CD
is
provided
to
prevent possible contact
between specimen and objective
as
well
as
to
simplify
coarse focusing. The lever
is
locked
after
coarse focus
has
been accomplished. This prevents
further
upward
travel
of
the
stage
by means
of
the coarse adjustment
knobs, and automatically provides a
limiting
stop
if
the stage
is
lowered and then raised again. The
automatic
pre-focusing lever does
not
restrict
fine
focus-
ing. (Fig. 4)
8
Fig. 3
Fig.4
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