Canon Speedlite 600 EX-RT User Manual (en, zh)

Flash Control from Camera’s Menu Screen
Flash firing
To perform flash shooting, set to [Enable]. To use the flash’s AF-
assist beam only, set to [Disable].
E-TTL II flash metering
For normal exposures, set it to [Evaluative].
If [Average] is set, the flash exposure will be averaged for the entire 
scene metered by the camera. Flash exposure compensation may 
be necessary depending on the scene. This setting is for advanced 
Flash synchronization speed in Av mode
You can set the flash sync speed when shooting in aperture-priority 
AE (Av) mode with flash.
Flash mode
You can select the flash mode from [E-TTL II], [Manual flash], 
[MULTI flash], [AutoExtFlash] and [Man.ExtFlash] to suit your 
desired flash shooting.
When the flash’s Custom Function C.Fn-05 is set to [1:TTL] (p.96), 
[TTL] can be selected. When performing autoflash shooting with an 
EOS digital camera, set to [0:E-TTL II/E-TTL].
Shutter synchronization
You can select the flash firing timing/method from [1st curtain], [2nd 
] and [High-speed synchronization]. To perform normal 
flash shooting, set [1st curtain].
Flash exposure compensation
In the same way as normal exposure compensation, you can set 
exposure compensation for flash. The flash exposure compensation 
amount can be set up to ±3 stops in 1/3-stop increments.
You can take three shots while automatically changing the flash 
output. The settable range is up to ±3 stops in 1/3-stop increments.