Nikon 25480B Guía Del Usuario

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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, “l m” will 
blink 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. 
Long exposure noise reduction is not available during movie 
recording. 

Photographs taken at high ISO sensitivities can be processed to 
reduce noise.

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 button ➜ C shooting menu

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 button ➜ C shooting menu

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.

Noise reduction is performed only at sensitivities of 1600 and 
higher. The amount of noise reduction is less than the amount 
performed when Low is selected for High ISO NR.