The D300(S) has better noise control than most cameras, so
it’s able to shoot up to ISO 800 with little noise. However, no
digital camera is completely without noise (that I know of), so
it’s a good idea to use some noise reduction above a certain
level of ISO sensitivity.
With the D300(S), the ISO can go up to 800 without
producing much noise. After that, you must choose to allow
or disallow High ISO NR (High ISO Noise Reduction). Here
are the selections:
▪ High
▪ Normal
▪ Low
▪ Off
For any of these settings, except Off, High ISO NR will be
performed starting at ISO 800. You’ll need to shoot some
high ISO exposures and decide for yourself whether you are
comfortable with High, Normal, Low, or even Off.
Figure 3-45 shows a sample image taken at ISO 3200 with
High ISO NR set to Off. I then took the same image at Low,
Normal, and High settings.
High ISO NR works by blurring the image more and more as
you change the setting from Low to High. By blurring the
image, you blend the grainy noise into its surroundings and
reduce the appearance of noise in the image. A variable
amount of mild resharpening is applied to restore some image
sharpness. This whole process tends to make the image lose
detail as noise reduction is turned to higher levels.
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