Canon EOS REBEL T2i 用户手册

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 Custom Function SettingsN

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Improves the highlight detail. The dynamic range is expanded from the 
standard 18% gray to bright highlights. The gradation between the grays 
and highlights becomes smoother.

The AF-assist beam can be emitted by the camera’s built-in flash or by an 
external, EOS-dedicated Speedlite.
0: Enable
1: Disable

The AF-assist beam is not emitted.

If an external, EOS-dedicated Speedlite is attached, it will emit the AF-
assist beam when necessary. The camera’s built-in flash will not fire the 
AF-assist beam.

Among EOS-dedicated Speedlites, only those which have an infrared 
AF-assist beam will be able to emit the beam. This prevents any 
Speedlite which uses a series of small flashes (like the built-in flash) 
from firing the AF-assist beam.

 

With setting 1, the [Disable] setting automatically takes effect for the 
Auto Lighting Optimizer (p.103) and it cannot be changed.

 

With setting 1, noise may become slightly more pronounced than usual.

With setting 1, the settable ISO speed range will be 200 - 6400.
Also, the <A> icon will be displayed on the LCD monitor and in the 
viewfinder when highlight tone priority is enabled.

If the external, EOS-dedicated Speedlite’s [AF-assist beam firing] Custom 
Function is set to [Disabled], the Speedlite will not emit the AF-assist beam 
even if the camera’s C.Fn-7-0/2/3 is set.

COP

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