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CONTROLS
IN
DETAIL-continued
___
_
Sensor
Unit
SU
-
101
(Optional)
Mounting the
SU·101
on
the camera:
Turn
the sensor
unit's locking wheel counterclockwise as far
as
it will
go,
slip the unit
's
mounting foot into the camera's
accessory shoe, and turn the locking wheel clockwise
to tighten
it.
In
combination with the optional Sensor Unit
SU-101,
the S8-102 provides non-TTL automatic flash exposure
control. With the S8-102
's
shooting mode selector
switch
® at "AUTO," the Sensor Unit
SU-101
reads the
light reflected back from the subject while the speed-
light
is
firing and tells the speedlight to turn itself off
when the light output
is
sufficient for correct exposure.
T
he
selector dial
on
the back of the
SU-101
allows one
of two aperture settings to
be
selected.
Normally, the
SU-101
is attached to the camera's
accessory shoe. However, when a plastic frame finder
or optical underwater viewfinder
is
mounted
on
the
camera's accessory shoe, the optional sensor holder
is
used to attach the Sensor Unit SU-
101
to the speedlight
bracket.
Mounting the
SU
·
101
on
the bracket: Insert the
sensor holder positioning
pin
@
on
the bracket into the
sensor holder, then screw the sensor holder's screw
into the sensor holder socket
@
on
the bracket.
To
attach the
SU
-
101
to the sensor holder, follow the same
procedures
as
when attaching the
SU-101
to the
camera
's
accessory shoe.
.
Camera
I
Sync Speed
I
Nikonos·V· 1/90 sec. or slower
Niko
nos
I
V·N
1/90 sec. or slower
Niko
nos
III
1/60 sec. or slower
Operating the SU·101:
The
two-position selector dial
on
the back of the sensor unit must
be
set according to
the instructions
in
Step B·6 (page
15)
.
To
obtain the
correct exposure, position the sensor
as
close to the
lens as possible .
• For more information about non-TTL automatic operation, see page
24
.
Synchronization
Speed
The
shutter speed at which the S8-102 synchronizes with
a camera depends upon the camera being used. The
table shows the flash sync speeds of various cameras.
80th the Nikonos-V and Nikonos
IV
-A cameras auto-
matically switch to the proper synchronization speed
when the S8-
102
's
power switch
is
turned
on
; when the
switch
is
turned off, the automatic switchover function
is
canceled. For convenience, the S8-
102
provides infor-
mation
an
d warnings through these cameras' viewfinder
ready-lights .
• Aperture-priority automatic exposure mode (HA H) operation
on
the
Nikonos·Vand Nikonos
/V
·A
is
canceled when the 5B·
102
is
turned
on.
To
determine the correct aperture, use the 5B-
102
's exposure calcula-
tion dial (see page
22).
Camera Setting
I Operable
Shutter
Speed
I
Viewfinder
Information
A 1/90 sec.
1/1000
to
1/125 sec. 1/90 sec.
Correct shutter speed
blinks··
1/60 to 1/30 sec.
as
set
M9
0 or B
as
set -
A 1/90 sec.
LED
does not light
M
(1/90 sec.) or B
as
set -
-
as
set
-
I
Remarks
ITLoperable
TTL
inoperable
When
battenes
In
the Nlkonos·V or Nlkonos
IV·A
are exhausted, reset the Nlkonos-V's shutter speed/mode selector dial to M90
(1
/90 sec.) or B
(
Bu
lb),
or
the Nikonos
IV-A's
shutter speed dial to M
(1190
sec.) or B (Bulb).
TTL
automatic flash control
is
not possible when the Nikonos·V
is
in
the M90 or B modes .
••
This
indicates the correct shutter speed as determined by the subject's brightness and the aperture setting. Although this is not a speedlight
function, it
is
helpful when using daylight fill-in flash shooting.
20