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-ACCESSORIES-continued,------------
Duplication work and photomicrography
The
F3AF combined with the proper accessory enables
you
to
perform duplication work or photomicrography.
In
these special-
ized areas of photography, however, focusing should
be
per-
formed manually using the matte portion of the focusing screen
as
autofocus/focus-aid operation
is
,
in
most cases, impossible.
In
addition, exposure compensation
is
required because these
areas of photography represent unusual contrast situations.
Shown
in
the table
is
the relationship between specific photo
types and proper exposure. S
in
ce this
is
meant to
be
a guide,
in
practice, you should make further compensation by experimen-
tation until you achieve the proper results.
Method
of
exposure
Exposure
1)
The
exposure compensation values listed below are reference
data obtained when general-purpo
se
film was used. With
color reversal film or microfilm for duplicat
ion
work,
it
is
advisable to take additional shots with
± one-stop exposure
compensation
as
these films have very small exposure
latitude.
2)
To
avoid vibration,
you
can make the exposure by turning the
illumination
on
and off.
3)
It
is
advisable to
use
a cable relea
se
to eliminate camera
vibration.
Subje
ct
measurement
compensation
Required
accessories
Remarks
Photographs and
Compensation
not
p
ic
ture
s
with
con
tin
u-
ou
s
gradation
necessary
For
high'contrast subjects, u
se
of
an
t8
%
Copy
Full·aperture
Approx.
+t
to
+2
Micro·Nikkor 55mm
112
.8:
reflectance
gray
card
in
determining
exposure
work
Documents and
or
stop-down
stops f
or
black letters
Cable release
is
recommended
.
With
the
card,
no
exposure
drawings of high
on
white background:
compensation is required regardless of whether
contrast
approx. -
112
to - 1
the background
is
black or white.
stop for white letters
on
black background.
Slide
with
continuous
Appro
x.
+ 1 to + 2
gradation stops
Micro·Nikkor 55mm
112
.8:
Approx. +1
·1
12
to Nikon
Sli
de Copying
Slide
+2,112 stops for black
Adapter PS·6:
When u
sin
g Nikon Slide Copying Adapter PS·6,
Stop·down letters
on
white back· Nikon Bellows
duplication
Slide of documents and
ground
Focusing Attachment
se
t the flood lamp 30cm away from its opal plate.
drawings photographed
o to approx.
-112
stop
PB
·6:
for white letters
on
Cable release
black background
Generally, results come out better with more
Photomicrography
Prepared specimen Stop-down
Appro
x.
+ 1 stop
Mi
croflex
PF
X
exposure
in
photomicrography. The compen·
sation
value
on
the
left
is
only
a
guide
:
determine
the
compensation
va
lu
e
by
test shooting.
+ : more exposure
-:
less exposure
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