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SPECIFICATIONS--------------
Electronic
construction
Guide
number
at
flash·to·subject
distance
of
1m
(approx. 3.3
It)
Angle
of
coverage
Automatic silicon·controlled
rectifier and
se
r
ies
circuitry
13
(at
ISO
100
an
d meter
s)
or
21 (at
ISO
25 and feet), for both
fl
ash
modules
at
full light output,
when the
S8
·21 is powe
red
by
batte
rie
s inside the controller
65
0
horizontal and 85
0
vertical
when both flash modules fi
re
(measured 1 m away)
Flash
duration
(approx.)
With
both
flash
With
one
flash
modules
module
Light
With
fresh
With
With
fresh
With
output
controller
external
controller
external
batteries
power
batteries
power
source
source
Full 1/2000sec. 1I1100sec.
1/1600sec. 1/870sec.
1/4
1/6500sec. 1/4700sec.
1/5300sec. 1/4500sec.
1/16
1/25000sec. 1/15000sec.
1/22000sec. 1/15000sec.
Power
source
Four 1
.5
V AA·type alkaline'
manganese, zinc·carbon or NiCd
batteries; external power
sou
rces
include optional
AC
Un
it
LA-
2
and
DC
Unit LD·2 which holds
eight 1
.5
V AA·type batteries
Number
of
flashes
and recycling
time
at
manual
full
light
output
Number
of
Recycling
Battery
type
flashes
time
(approx.)*
(approx
.)*
Alkaline·manganese
200
8sec
.
In
side
Zinc·carbon
50 13sec.
controller
NiCd"
60 7sec.
Alkaline·manganese
300 4sec.
In
side
Z
in
c·carbon
90 8sec.
LD
-2
Ni
Cd**
100
3sec .
• Greater number
of
flashes and decreased recycling time
are avaifable at 114 or 11
16
light output, or during
TTL
auto flash operation .
• - With NiCd batteries, number
of
flashes and recycling time
depend
on
battery condition.
Flash exposure
control
TTL
mode
Two
flash modes are available,
manual
and
TTL auto
For
TIL
auto flash operation;
with S8-21
A,
this
is
possible only
with Nikon F3-series cameras;
with
SB-21
B, this
is
possible only
with the Nikon
F4
-series,
F-801/N8008,
FA,
FE2,
F-501/N2020, F
-3
01/N2000 or
FG
cameras
Usable
film
speed
ISO
25 to 1000 with Nikon
range in TTL F4-series, F-801/N8008,
mode
F-501/N2020 and F-
301
/N2000;
M
mode
Dimensions
(approx_)
S8
-2
1 Main Unit
AS-12
Controller
AS
-1
4 Controller
Weight (approx.)
S8
-2
1 Main Unit
AS
-
12
Controller
AS
-1
4 Contro
ll
er
Accessories
provided
ISO
25 to 400 with Nikon
F3-series,
FA
, FE2 and
FG
For manual flash operation; light
output can
be
varied in three
step
s-full,
1/4
and
1/16
1
30
mm x 1
20
mm
x2
1 mm
100mm x 90mm x 41.
5mm
(excluding mounting foot)
100mm x 90mm x
41
.
5mm
(excluding mounting foot)
145g
280g (without batteries)
250g (without batterie
s)
Condenser Adapter
SW-8
; 52mm
adapter ring; 62mm adapter ring;
so
ft
cases
SS-21
(for
S8-21
Main
Unit,
SW-8
and
52
mm
and
62mm adapter ring
s),
SS
-
17
(
fo
r controller)
• All performance data are for normal-temperature
operation
[20°C
(68°F)]
• Specifications and designs are subject
to
change without
notice.
47