Canon EOS-1DS Mark III Instruction Manual page 163

Custom Function Settings
C,Fn ll: Image/FJash e×posuretDispJay
0: Off
1 : Auto
For 1 sec. or longer exposures, noise reduction is performed
automatically if noise typical of _ong exposures is detected. This [Auto]
setting is effective in most cases.
2: On
Noise reduction is performed for all exposures 1 sec. or longer. The IOn]
setting may be effective for noise that cannot be detected or reduced
with the [Auto] setting.
With setting 2, if a long exposure is made during Ltve View shooting, the
LCD monitor will not display anything trio Live View image dls F ay} while
noise reduction _s applied after the picture is taken. Dunng [ne noise
reduction process, shooting is possible. However, you will no-[ be able [o see
anytHng on the LCD "nonttor and in the viewfinder. Since you cannot check
the focus and picture composition, shooung }s not recommended during the
noise reduction process.
With setting 1 and 2, after the picture is taken, me noise reducuon process
may take the same amount of time as the exposure. During the noise
reducuon, shooting is still possible as long as the maximum burst indicator
in the viewfinder shows "1" or higher.
0: Off
1: On
Reduces the noise generated in the image. Although noise reduction is
applied at all ISO speeds, it is particularly effective at high ISO speeds.
At low ISO speeds, the noise in the shadow areas is further reduced.
@ With setting 7, the maximum buist for continUOUs ShOoting Will greatly .....
decrease.
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