Canon EOS60D18135ISKIT User Manual (en)

 Setting the FlashN
Shutter sync.
Normally, set this to [1st curtain] so that the flash fires immediately 
after the exposure starts.
If [2nd curtain] is set, the flash will fire right before the exposure 
ends. When this is combined with a slow sync speed, you can create 
a trail of light such as from car headlights at night. With 2nd curtain 
sync, two flashes will be fired, once when you press the shutter 
button completely, and once immediately before the exposure ends. 
However, with shutter speeds faster than 1/30 sec., 1st curtain sync 
will automatically take effect.
If an external Speedlite is attached, you can also set [Hi-speed
(e). For details, see the Speedlite’s instruction manual.
Flash exposure compensation
See “y Flash Exposure Compensation” on page 132.
E-TTL II flash metering
For normal flash exposures, set it to [Evaluative].
If [Average] is set, the flash exposure will be averaged for the entire 
metered scene as with an external metering flash. Since flash 
exposure compensation may be necessary depending on the scene, 
this setting is for advanced users.
Wireless flash
See “Using Wireless Flash” on page 139.
Clear flash settings
With the [Built-in flash func. setting] or [External flash func. 
] screen displayed, press the <B> button to display the 
screen to clear the flash settings. When you select [OK], the settings 
for the flash will be cleared.