Custom Function Settings - Canon Rebel T2i EOS 550D Instruction Manual

Custom Function SettingsN
3
Custom Functions are organized into four groups based on the function
type: C.Fn I: Exposure, C.Fn II: Image, C.Fn III: Autofocus/Drive, C.Fn
IV: Operation/Others.
C.Fn I: Exposure
C.Fn-1
0: 1/3-stop
1: 1/2-stop
Sets 1/2-stop increments for the shutter speed, aperture, exposure
compensation, AEB, flash exposure compensation, etc. Effective when
you prefer to control the exposure in less fine increments than 1/3-stop
increments.
The exposure level will be displayed in the viewfinder and on the LCD
monitor as shown below.
C.Fn-2
0: Off
1: On
For the ISO speed, "H" (equivalent to ISO 12800) will be selectable.
C.Fn-3
0: Auto
The flash sync speed is set automatically within a range of 1/200 sec. to
30 sec. to suit the scene's brightness.
1: 1/200-1/60 sec. auto
When flash is used with aperture-priority AE (f), this prevents a slow
flash-sync speed from being set automatically in low-light conditions. It
is effective for preventing subject blur and camera shake. However,
while the subject will be properly exposed with the flash, the background
will come out dark.
2: 1/200 sec. (fixed)
The flash-sync speed is fixed to 1/200 sec. This more effectively
prevents subject blur and camera shake than with setting 1. However,
the background may come out darker than with setting 1.
192
Exposure level increments
ISO expansion
Flash sync. speed in Av (Aperture-priority AE) mode