Canon Speedlite 600EX II-RT Manual (en)

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' Radio Transmission Wireless Flash Photography
When performing radio transmission wireless flash photography, 
function restrictions may apply, depending on the camera used.
 
EOS DIGITAL cameras released in and after 2012
When using the flash with EOS DIGITAL cameras released in and 
after 2012, you can shoot without any restrictions on the flash mode 
and flash synchronization speed, etc.
* Although EOS REBEL T6/1300D and EOS REBEL T5/1200D were 
released after 2012, restrictions on functions are the same as with EOS 
DIGITAL cameras released up to 2011. (See the following explanation for 
details.)
 
EOS cameras compatible with E-TTL and released up to 2011
 
When using the flash with the cameras listed below, radio 
transmission wireless shooting using E-TTL autoflash is not 
possible. 
Shoot with manual flash (p.77), stroboscopic flash (p.42) 
or optical wireless transmission (p.89).
EOS-1Ds, EOS-1D, EOS-1V, EOS-3, EOS Elan II/Elan II E/50/50E, EOS 
REBEL 2000/300, EOS REBEL G/500N, EOS REBEL XS N/REBEL G II/
3000N/66, EOS IX, EOS IX Lite/IX7
Also, when using the flash with an EOS DIGITAL camera or EOS 
film camera released up to 2011, the following restrictions 
apply.
1. The maximum flash sync shutter speed becomes 1 stop 
slower.
Check the maximum flash sync shutter speed (X = 1/*** sec.) of 
your camera and shoot with a shutter speed up to 1 stop slower 
than the maximum flash sync shutter speed (Example: When X = 
1/250 sec., radio transmission wireless shooting is possible from 
1/125 sec. to 30 sec.).
When you set the shutter speed 1 stop slower than the maximum 
flash sync shutter speed, the <k> warning icon will disappear.
Restrictions on Functions Depending on the Camera Used