Canon Speedlite 430EX III-RT Instruction Manual - Page 49
Restrictions on Functions Depending on the Camera Used
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' Radio Transmission Wireless Flash Shooting Restrictions on Functions Depending on the Camera Used When performing radio transmission wireless flash shooting, function restrictions may apply, depending on the camera used. EOS DIGITAL cameras released in and after 2012 When using the flash with a camera such as the EOS-1D X, you can shoot without any restrictions on the flash mode and flash sync speed, etc. * Although EOS REBEL T5/1200D was 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 the manual flash (p.62) or optical transmission wireless slave function (p.71). 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 flash sync speed is 1 stop slower. Check the flash sync speed (X = 1/*** sec.) of your camera and shoot with a shutter speed up to 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.). When you set the shutter speed 1 stop slower than the flash sync speed, the warning icon will disappear. 2. High-speed sync shooting is not possible. 3. Group flash is not possible (p.63). 4. Modeling flash from the slave unit (p.65) as well as remote release from the slave unit (p.66) are not possible. 5. The camera cannot be used for a "slave camera unit" during linked shooting (p.67). The camera can only be used for a "master camera unit". 49