Nikon D300 Complete Manual page 287

such problems. Still, if you shoot long exposures (anything
over 8 seconds) you should probably turn this option On.
• High ISO NR—performs in-camera noise reduction on
images taken at ISO 800 or higher. The manual and menu
system seem a little out of sync with one another here:
Off
Low
Normal
High
Since this is apropos to a discussion of ISO, let's look at how
noise reduction fares at the highest ISO value, HI 1.0.
Thom Hogan's Complete Guide to the Nikon D300
ISO 100 to
ISO 640
No noise
reduction
applied
No noise
reduction
applied
No noise
reduction
applied
No noise
reduction
applied
ISO 800 to
ISO 3200
No noise
reduction
applied
Minimal amount
of noise
reduction
applied
Moderate
amount of noise
reduction
applied
Large amount of
noise reduction
applied
V1.02
ISO HI 0.3 to
ISO HI 1.0
Minimal amount
of noise
reduction
applied
Moderate
amount of noise
reduction
applied
Large amount of
noise reduction
applied
Extremely large
amount of noise
reduction
applied
Page 287