Canon EOS-1Ds Instruction Manual
111
Flash Photography
6
Flash Photography with Speedlite 550EX
Modeling Flash
By firing a modeling flash, you can see the shadows and other flash lighting effects produced
by one or more Speedlites.
by one or more Speedlites.
Make sure the camera and Speedlite are
properly set for flash photography.
properly set for flash photography.
1
Press the camera’s depth-of-field pre-
view button.
view button.
s
The Speedlite 550EX fires at 70 Hz for 1 second.
2
Wireless, Multi-Speedlite System
Speedlite 550EX has the following three features:
(1) E-TTL autoflash
(2) Slave unit feature
(3) Master unit feature for wireless control of 550EX slave units
(2) Slave unit feature
(3) Master unit feature for wireless control of 550EX slave units
By using the above features, you can set up a wireless E-TTL autoflash system with multiple
Speedlite 550EXs.
You can also set a flash output ratio for up to three Speedlites grouped as main and sub
Speedlites to create the desired flash lighting effect.
Speedlite 550EXs.
You can also set a flash output ratio for up to three Speedlites grouped as main and sub
Speedlites to create the desired flash lighting effect.
•
For details, see the 550EX and ST-E2’s Instructions booklet.