Nikon Z9 Mirrorless Camera - Manual (Page 514)

514 C The Photo Shooting Menu: Shooting Options
Select [ ON ] to reduce “noise” (bright spots or fog) in photographs taken
at shutter speeds slower than 1 s.
• Long-exposure noise reduction is performed after the photo is taken.
During processing, the message, “[
Performing noise reduction ]” will
appear in the shooting display and “ Job NR ” will flash in the control
panel. Pictures cannot be taken until the message has cleared from
the display. The time required to process photos after shooting
roughly doubles.
D Caution: Long-Exposure Noise Reduction
If the camera is turned off before processing is complete, the picture will be
saved but noise reduction will not be performed.
Long Exposure NR
G button
U C photo shooting menu
Control panel Monitor