Canon EOS-1DS Mark III Instruction Manual page 108

Flash Photography
Using NonLEX_sedes Canon Speedtites
® With an EZ/E/EG/ML/TL-sedes SpeedJite set in the TTL or AoTTL
autoflash mode, the flash can be fired at full output onJyo Set the
camera's shooting mode to manual or aperture-priority AE and shoot.
® When using a Speedlite which has manual flash mode, shoot in the
manual flash mode.
® With an EX-sedes Speedlite set to TTL autoflash with the flash's
Custom Function, the flash will fire at full output only.
Using Non=Canon FJash Units
Syne Speed
The camera can synchronize with non=Canon compact flash units at
11250 sec= and slower speeds. With large studio flash units, since the
flash duration is longer, set the sync speed within 1130 sec= to 11125
sec= Be sure to test the flash synchronization before shooting.
PC Terminal
@
® The camera's PC terminal is provided
for flash units having a sync cord. The
PC terminal is threaded to prevent
inadvertent disconnection.
® The camera's PC terminal has no
polarity. You can connect any sync
cord regardless of its polarity.
If the camera is used with a flash unit or flash accessory oeo/ca_ed to
another camera erano, me camera may no_ operate property and
malfunction may resum
Also. do not connect to the camera s PC terminal any flash unit requinng
250 V or more,
Do not attach a hgh-voltage flash unit on the camera's hot shoe. It migm
not work.
A flash unit attached to the camera's hot shoe aria a flash unit connected to
the PC terminal can both be used atthe same time.
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