Nikon D40 - Manual (Page 85)

Menu Guide/Shooting Options: The Shooting Menu 73
ISO Sensitivity
Adjust ISO sensitivity ( 37).
Noise Reduction
Photographs taken at high sensitivities or at shutter speeds of 1s
or slower can be processed to reduce “noise” in the form of mot-
tling or randomly-spaced, brightly-colored pixels. Choose from
the following options:
Frame rates will slow if On is selected in continuous shooting mode ( 32).
Option Description
Off
(default)
Noise turns off reduction at ISO sensitivities of 1600 or less. Minimal noise reduction is still
performed when ISO sensitivity is set to HI 1.
On
Photographs taken at ISO sensitivities over ISO 800 or at shutter speeds of about 1s or
slower are processed to reduce noise (if shutter speed is 1s or slower, time need to process
photographs before they are recorded approximately doubles and capacity of memory
buffer may drop). “Job nr” is displayed at the bottom of the viewfinder during processing.
Noise reduction will not be performed if the camera is turned off before processing is com-
plete.