Canon EOS-1D X マニュアル

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If the shooting result is dark or the contrast is low, you can use the Auto 
Lighting Optimizer function to auto-correct the brightness and contrast, 
and obtain a more pleasant image.
You can also change the settings of the image shot with the camera’s 
Auto Lighting Optimizer function.
This function is compatible only with RAW images shot with EOS-1D X, 
EOS-1D Mark IV, EOS 5D Mark III, EOS 5D Mark II, EOS 7D, EOS 60D, 
EOS 50D, EOS REBEL T4i/650D, EOS REBEL T3i/600D, EOS REBEL 
T2i/550D, EOS REBEL T1i/500D and EOS REBEL T3/1100D.
* ALO stands for Auto Lighting Optimizer.



For images shot with the camera’s Auto Lighting Optimizer 
function, the checkbox is already checked.



Auto correction is applied to the image to match the settings.



For images shot with the camera’s Auto Lighting Optimizer 
function, the settings at the time of shooting are applied as the 
default values.



To cancel the Auto Lighting Optimizer, remove the check mark 
from the checkbox.

Checkmark

Select from three levels: 
Low/Standard/Strong



When [Highlight tone priority] is set to [Enable] in EOS-1D X, EOS 
5D Mark III, EOS 7D, EOS 60D, EOS REBEL T4i/650D, EOS 
REBEL T3i/600D, EOS REBEL T2i/550D and EOS REBEL T3/
1100D, the Auto Lighting Optimizer function cannot be set.



You cannot use the Auto Lighting Optimizer with multiple-
exposure RAW images created on the camera.

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