Nikon SB-140 Manual de instruções - Página 26
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TECHNICAL INFORMATION
-continued
_ _
Selecting/Determining Aperture
Automatic operation - for visible light only
Turn the exposure
calculator
dial until the number
corre-
sponding
to the film
speed
is opposite the AUTO/MFULL
index and
you
can read three usable f/stops.
Dots between the numbers on the film
speed scale
re-
present intermediate
settings.
2500 2000 1250
640 500 320 250
125
80
40
20 16
10 8
1600 1000800
400
200
160
100
64
50
32
25
12
[ffi)
IQY]
Three factors
should
be considered
in selecting
a
suitable
f/stop-flash-to-subject
distance,
depth of
field and
recycling time.
Flash-to-subject distance
flstop
indicators
®
also indicate
the range of flash-to-
subject distances for
automatic shooting.
Distance
ranges are constant, regardless of the film
speed set on
For Manual Operation
The S8-140 offers
a choice
of light
output,
full or 1/4.
Depending on the amount of light
desired,
set
the
shoot-
ing mode
selector
of the Sensor Unit at the FULL or 1/4
position.
26
the dial. 0.6
m
to 8 m (2 to 26 ft.) for the
0
indicator,
0.6 m
to 5.6m (2 to
18ft.)
for the 6
indicator,
and 0.6m to 4m (2
to 13
ft.) for
the
0
indicator.
For example,
to
shoot a subject more than 5.6m (18ft.)
away,
use
the flstop indicated
by
the
0
indicator-f/4
when
using ISO 100 film
.
To
shoot a subject
more than
8m (26ft.)
away,
use
the
S8-140 on manual.
Recycling Time and Depth-ot-Field
With
a subject
distance
that remains
constant,
the wider
the
aperture
selected,
the
faster will
be the recycling
time
of the flash unit, but the less the
depth
of field. With
ISO
100 and a subject up to 4m (13ft.)
away,
you can select
anyone of
the three
indicated f/stops-f/4
,
f/5 .6 or f/8-
taking
into consideration recycling time or
desi
red depth
of
field.
Visible-light flash photography
Turn the exposure
calculator
dial
so
the AUTO/MFULL
index
@
is opposite the film
speed
in use
for
full
output,
or
the M1/4
@
index is opposite
film speed in
use
for
114
output.
Read the f-number
which
appears directly
above
the
flash-
to-subject
distance,
then
set
this
aperture on your
lens.
For
example,
to
shoot a subject 2m (7ft.) away at full
output
with ISO
100,
use
fl16
.
To
shoot
the
same subject
at 1/4
output,
use f/8
.