Canon EOS 5D Mark III Instruction Manual (en)

 Processing RAW Images with the CameraN
 Chromatic aberration correction
When [Enable] is set, the lens’ chromatic aberrations (color fringing 
along the subject’s outline) can be corrected. If [Enable] is set, the 
corrected image will be displayed. If the effect is difficult to discern, 
press the <
u> button to magnify the image. (Press the <u> button 
to return to the normal view.)
About peripheral illumination correction, distortion 
correction, and chromatic aberration correction
To execute peripheral illumination correction, distortion correction, and 
chromatic aberration correction with the camera, the data of the lens used 
for the shot must be registered in the camera. If the lens data has not been 
registered in the camera, use EOS Utility (provided software, p.394) to 
register the lens data.
Processing RAW images in the camera will not produce the same results as 
processing RAW images with Digital Photo Professional.