Nikon Df - Long Exposure NR (Long Exposure Noise Reduction); High ISO NR

242
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If On is selected, photographs taken at
shutter speeds slower than 1 s will be
processed to reduce noise (bright spots,
randomly-spaced bright pixels, or fog). The
time required for processing roughly
doubles; during processing, “lm” will
flash in the shutter speed/aperture
displays and pictures can not be taken (if the camera is turned off
before processing is complete, the picture will be saved but noise
reduction will not be performed).
In continuous release mode,
frame rates will slow and while photographs are being processed,
the capacity of the memory buffer will drop.
Photographs taken at high ISO sensitivities can be processed to
reduce “noise.”
Long Exposure NR (Long
Exposure Noise Reduction)
G button ➜ C shooting menu
High ISO NR
G button ➜ C shooting menu
Option Description
High Reduce noise (randomly-spaced bright pixels, lines, or fog),
particularly in photographs taken at high ISO sensitivities.
Choose the amount of noise reduction performed from High,
Normal, and Low.
Normal
Low
Off
Noise reduction is only performed at ISO sensitivities of ISO
3200 and higher. The amount of noise reduction is less than
the amount performed when Low is selected for High ISO NR.