Canon 300X Camera Lens User Manual


 
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5Setting Custom Functions
C.Fn-02 AF point selection method
0 : Press AF point selection button, then press the cross keys.
1 : Press the shutter button halfway, then press cross keys.
Effective during the <˜> and <> active times.
Pressing the <3> button switches to automatic AF point
selection.
C.Fn-05
Shutter curtain sync with built-in flash and EX-series Speedlite
0 : 1st-curtain sync
1 : 2nd-curtain sync
With second-curtain sync and a slow shutter speed, you can
create a light trail following a moving subject. The flash fires
right before the shutter closes. Second-curtain sync can be set
even with EOS-dedicated Speedlites which cannot switch the
shutter curtain synchronization. The Speedlite with a shutter
curtain synchronization setting will override the camera’s
setting.
When you press the shutter button completely, a preflash will be
fired for flash exposure control.
C.Fn-06 Flash sync speed in Av mode
0 : Auto
1 : 1/125 sec. (fixed)
When you use flash in the aperture-priority mode (Av), the flash
sync speed will be fixed at 1/125 sec. This prevents the camera
from setting a slow sync speed in low-light conditions.
C.Fn-03
Switch to center AF point with AF point selection button
0 : Disabled
1 : Enabled
C.Fn-04 Emission of built-in AF-assist beam
0 : Enabled
1 : Disabled