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Fig. 18
Fig. 19
Image of the field
iris
diaphragm
Field of view
Fig.
20
Fig. 21
.I
11
Diopter adjustment
1)
Look
at
the
image
through
the
r
ig
ht
eyepiece
with your
right
eye, and
focus
on
the
specimen
'vVith the focus adjustn1ent
knobs.
2)
1\Jex
t,
look
ing
at the
image through the left
eyepiece 'Nith your
left
eye, rotate
the
diopter adjustment
ring
:");
to focus
on
the
specimen
vvithout
us ing
the
focus
adjustment knobs.
(F ig. 18)
11
Centration of the field iris diaphragm
CH2·F~
(optional)
1)
Rotate
the diaphragm
ring
c·l)
counter
clockwise
to
stop
dovvn the ir
is
diaphragm
to
the minimum. {F
ig. 19)
2)
Rotate
the
condenser
heig
ht
adjustment
kn ob
(~
;
in either
di
rection
unt
il
tile
image
of
the field d iaph ragm is
vis1ble sharply
in the field
o
f
view. (Fig.
19)
3)
Bring the
image of
the field diaphragm into the
center of
the field
by
means
of the two
attachment
lens
centering
screws
(3)
.
(Figs. 19,
20)
4)
Open the diaphragm
until th
e
small
ring
of
the
diaphragm
inscribes th
e
field of vie'vv.
If
the
polygonal ring
is
not concentric
with the field
of
view,
repeat the
centering procedure
mentioned
above.
(Fig
.
20)
5)
After
ce
ntration is
com
plete, re-open the
diaphragm
unt
il
it becomes
a
larger
po
lygonal
ring
around (or
circumscribes)
the
circular edge of
the
field.
11
Objective change
1)
Swing
i
n the
objective
to
use.
(Fig.
21)
2) Be
certain to click the
nosepiece
in position.
·---------------------------------------------------------
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