
CONTROLS
lNDETA|L-continued
Synchronizofion
Speed
Theshutterspeed
at whichthe SB-103
synchronizes
witha camera
dependsuponthecamerabeing
used.
The tableshows
the flashsync speeds
of various
cameras.
Both
the Nikonos-Vand Nikonos
lV-Acamerasauto-
maticallyswitch
to the proper
synchronization
speed
when the SB-103'sshooting
mode selector/power
switch
issetto "TTL,"
"MFULL,"
"M114,"
or"M1116";
when
itis
set
to"OFF,"
the
automaticswitchover
func-
tion
iscanceled.
cAperture-priority
exposure
mode ("A") operation
on the Nikonos'V
and Nikonos
lV-AiscanceledwhentheSB-103
isturnedon.Todeter-
minethecorrectaperture,use
fhe58-7033 exposurecalculation
chart
kee page1il.
"When batteries
in the Nikonos-Vor NikonoslV-A
areexhausted,resetthe Nikonos-V'sshutterspeed/modeselector
dialto M90
(1
/90 sec.)or B
(Bulb),
or the Nikonos
lV-A's
shutter
speeddialtoM (1/90
sec.)or B(Bulb).
TTL
automatic
flashcontrolis not
posslble
when
the Nikonos-V
is
in the M90or B modes.
.*This indicates
the
correctshutterspeedasdeterminedby thesubjeclSbrlghlnessandthe
aperturesetting.Althoughthisisnota speedlight
function,it is helpfulwhenusingdaylight
fill-inflash
shooting.
1/90
sec.orslower Correctshuttersoeedblinks**
1/1000to1/125sec
1/60to1/30sec.
TTLinoperable
Nikonos
lV-A* 1/90
sec orslower M
(1/90
sec.)or
B
Nikonoslll 1/60
sec.
orslower
Shoofing
ModeSelecfor/Power
Switch
@
Theshooting
modeselector/power
switch
hasfiveclick-
stop
settings.
Theshooting
modesthatcanbeused
with
specificcameras
arelisted
above.
('OFF"
position
Thespeedlight
isturnedoffwhentheswitchissetat
thisoosition.
"TTL" position-TTL (through-the-lens)
Automatic
FlashMode
Thismode,
whichcanbeusedonly
inconjunction
with
the
Nikonos-Vcamera,
automaticallycontrolsthe
flash
exposure
Through-The-Lens
(TTL).
Inthis
mode,
the
Nikonos-V's
SPD
(silicon
photodiode)
reads
the light
passing
throughthe
lensandautomaticallysignals
the
SB-103toturn
itselfoff
when
the
exposureiscorrect.
16
Therange
ofuseableapertures
islarger
(from
t12.8
to
tl22when
using
ASA/ISO100film)with
TTLflash,
and
you
can
easilycontrolthe
depthof
field.In
addition,the
TTL mode makesdaylight
fill-inflash and close-up
photography
easierthanever.
.The useable
film speedrange for TTLoperation
is from ASA/ISO25
to400.Forinformation
about
theapertures
thatcanbe usedat various
filmspeeds,see
page18.
oTTL
operationis not posslb/e
with the NrkonoslV-Aor lll or whenthe
Nrkonos-V'sshutterspeed/modeselectordralissetat M90(ttgOsec.)
or
g(gutd.
. Evenif the Nikonos-V'sshutterspeed/mode
selector
dral
issetat "
A"
or from 1/30to 1/1000sec.,
TTLoperation
is not possib/ewhen: the
synccord is not securelyconnected,the ASA/ISO
film is setbeyond
ASA//SO400,or thebatteriesarecompletely
exhausted.
oln TTLautomaticflashoperation,the SB-103emits
amountsof light
sufficient for subjects
havingaveragereflectivity.Therefore,correct
exposuremay
notbeobtainable
if the subiect's
reflectivity
isextremely
loworhigh.