Canon Speedlite Transmitter ST-E3-RT - Manual (Page 21)

19
' Wireless Flash Shooting
When performing radio transmission wireless flash shooting,
restrictions may apply to the flash mode, maximum flash sync speed
(referred to below as the “flash sync speed”) and high-speed sync
function, depending on the camera that you use.
EOS digital cameras released since 2012
When using the transmitter in combination with a camera such as
the EOS-1D X, you can shoot without any restrictions on the flash
mode and maximum flash sync speed.
EOS cameras compatible with E-TTL autoflash and released up
to 2011
When using the transmitter with the cameras listed below, radio
transmission wireless shooting with E-TTL autoflash is not
available. Shoot with manual flash (p.34) or stroboscopic flash
(p.35).
EOS-1Ds, EOS-1D, EOS-1V, EOS-3, EOS ELAN II(E)/
EOS 50(E), EOS REBEL 2000/EOS 300, EOS REBEL G/
EOS 500N, EOS 66/EOS Rebel XS N/EOS 3000 N, EOS IX(E),
EOS IX Lite/EOS IX 7
Also, when using the transmitter with a film or digital camera
released up to 2011, the following restrictions apply.
1. The flash sync speed is 1 increment slower
Check the flash sync speed (X = 1/*** sec.) of your camera, and
shoot with a shutter speed up to a maximum of 1 stop slower
than the flash sync speed (Example: When X = 1/250 sec., radio
transmission wireless shooting is possible from 1/125 sec. to 30
sec.). Also, high-speed sync shooting is not possible. When
you set the shutter speed 1 increment slower than the flash sync
speed, the warning icon will disappear.
2. Group flash is not possible (p.38).
About Restrictions on Functions Depending on
the Camera Used
COP
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