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Nikon DIAPHOT 300 - Page 37

Nikon DIAPHOT 300
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12.
Photomask
The
photomask
of
the
pattern
shown
in
the
figure
is
put
into
the
optical
path
by
turning
down
the
reticle
in/out
lever
on
the
front
panel
of
the
microscope.
This
photomask
is
used
for
trimming
and
focusing
in
photomicrography,
and
diopter
adjustment
of
the
eyepieces.
Rectangular
frame:
The
rectangular
frame
shows
the
photomicrography
range
of
a
35mm
SLR
camera.
It
also
shows
the
photomicrography
range
of
a
photomicrographic
attachment
used
with
the
2.5
x
PL
lens.
(If
a
PL
lens
of
different
magnification
is
used,
determine
the
photomicrography
range
by
looking
through
the
finder
of
the
photomicrographic
attachment.)
Double
crosshairs:
The
double
crosshairs
are
used
for
diopter
adjustment
of
the
eyepieces
and
centering
of
the
condensers.
31

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