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Nikon SB-21 Instruction Manual page 41

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With 5B-21B
Blinking ready-light
Inside
On AS-14
Problem and remedy
viewfinder
1) The AS-14 is set at
TIL
with a camera other than
Nikon
F4-series,
F-801/N8008,
FA,
FE2,
F-501/N2020,
F-301/N2000
or
FG. Reset
flash mode selector to
M.
2) In
TIL mode, film
speed setting on
the
camera
is
beyond
the
usable
range.
Use
film within the correct
range
for
TIL
auto flash photography-ISO 25 to 400 with the
FA,
FE2 or
FG; ISO
25
to
1000 with the
F4-series, F-801/N8008,
F-501/N2020 or
F-301
/N2000.
With the
FA,
the ready-light also blinks when the film speed setting on
the camera is near ISO
12.
0
-
3) With the
FA,
FE2 or
FG
in
TIL
mode,
the camera's shutter speed dial is set at a
mechanical setting (M250
,
M90 or
B).
Reset
shutter speed dial to another
setting.
For
M250,
M90 or
B
setting,
reset the AS-14's mode selector to
M.
On the F-501
/N2020
and F-301
/N2020,
B is not a mechanical shutter speed
setting;
you can use any setting on the
F-501
/N2020's exposure mode selector dial or
F-301 /N2000's shooting mode selector dial.
4) When the shutter speed set on the
FM2
or FE is faster than the flash sync
speed.
Reset
to flash sync speed or
slower.
0
0
The
flash fired at full
light
output in
TIL
mode;
lighting might be insufficient.
(See page
37).
Note:
With the Nikon
F-401IN4004,
the TTL mode
is
inoperable reg?rdless of ready-light indication.
USING THE FOCUS ILLUMINATOR----------
When ambient light is insufficient for
focu
sing
,
push the focu
s
illuminator
button
to
provide
illumination
.
The
focus illuminator stays on approx. one
minute
unless
you release the shutter
;
releasing shutter
turns
off the
focusing illumination
lamp.
The illuminator houses two
lamps.
With four AA-type batteries in the
con-
troller, only one lamp
lights up.
To activate both lamps, use the
external
power source (see page
44).
41

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