Fig.
22
4.
Focusing Procedure
Use
the field
of
view eyepieces
for
focusing on the
film
plane. Each field
of
view eyepiece
has
a focusing
front
lens and a
relide
with
4 frames, each frame indicating
the
area covered
by a specific power NFK
photo
eyepeice.
(Fig.
22)
The
number
at
each
frame indicates the
magnification
of
the
photo
eyepiece. The
image in
the
field
of
view eyepiece and
the
image
on
the
film
plane are
in
focus at the
same
time. Several
type
field
of
view eye-
pieces
are
available, according
to
the
film
size employed.
Field
of
view eyepiece
35WHK10X PWHK10X
4X5WHK10X
MHWHK10X
35mm
Back
3%"
x
4%"
4"
x
5"
16mm
Bolex
Attachment
camera
Polaroid
Sheet Film or
camera
Back Polaroid
Film
120 Roll Film
Holder Holder
1)
Select the field
of
view eyepiece matching
the
camera
bSlck
in
use
and insert
it
into
the
right eyepiece tube
of
the
trinocular
tube, aligning locating groove and locating pin.
2) While
looking
through the
field
of
view eyepiece, rotate the eyepiece
front
lens
in
screw
mount
to
focus on the
double
cross lines in
the
field.
For
sharp focusing
with
objectives
4X
or
lower,
the
focusing magnifier
FT
is
recommended on account
of
their
considerable
depth
of
focus.
3)
Bring
the
specimen detail
to
be
photographed
within
the frame corresponding
to
the
power
of
the NF K eyepiece
in
use
and focus on
the
specimen
with
the microscope fine
adjustment knobs. Make sure the
light
path selector
knob
on
the
observation tube
is
either on the white
(V)
or
yellowijreen
(eVI
band.
4)
It
is
recommended to
tighten
the tension adjustment ring considerably
to
prevent
the
stage
from
dropping
during
long exposures.
16
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