8
The
aperture
diaphragm
is
adjusted with the
lever
Th
ere
is
a
scale for reproducible s
etting
of
the
condenser
diaphragm.
The
slit at the side is intended fo r the in
se
rtion
of
slides with
annular stops
for
simple
darkfi
e
id
or
ph
ase contr
as
t illumina-
tion. These
can
only be
taken
o
ut
of
condenser n
o.
56
again
after the le
ver
has been pressed.
Condenser
LK
The
LK condenser has a hinged co
ndenser
top S
1.1.
When
the
con
denser
top isswung o
ut
,
th
e lower
part
of the
cond
eo
ser
can
illuminate aU obj
ec
t
fi
e
ld
s
of
o
bj
ectives from 2.5x upwards
with field
of
view index
20.
Wh
en using ob
je
ctives of
lOx
and
higher the condenser
top
must
be
swung
in
. This is done with
the handle (8.2).
Fig
.
7b
Cond
ens
er
no.
56
I. Protective ring
2. Locking lever for
f>
hde with
dif
Tu
sion disc and annul
ar
stops
3. Slil ror slide with
diff
usion
di
sc and annular st
op
s
4.
Lever for adju stment of aperture diaphragm
5. Dovetail guide
With
co
ndenser
top A
0.
90 S
1.1
swung in,
the
co
nden
ser LK
works with
the
numerical
aperture
A 0.90.
Th
e image of
the
field
diaphragm
is produ
ce
d with the
cond
enser top S
1.1
in a
gla
ss
me
dium
1.2
mm
over
th
e stage surfac
e.
The condenser top
of
the LK condenser
is
interchangeable via
a thr
ea
d
with
other conden
se
r tops with a higher
num
erical
ap
~
rlur
e
or tops
with
a
long
er working distance.
Darkfi
eld con-
dens
er to
ps
D 0
.8
0 or D 1.19 can also be screwed
on
instead
of
the S
1.1
standard top.
Furth
er
information
on condenser tops
can be found in the table o n page 10.
The
aperture iris
diaphr
a
gm
is adjusted with thc lever (8.3).
Ther
e
is
a
sc
ale for reproducible
se
tting
of
the
condenser
diaphragm.
Fig. 8 Co
nden
s
er
LK
t A 0.
90
S
I.l
Co
nd
enser top
2
H<lndl
e
to
swing
out
th
e
co
nd
en
se
r top
J
Lev
er
for
adju
stment
of
t
he
il
perture
dia
ph
rn
gm
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