Nikon D300 User Manual page 410

Problem Solution
Page
• Choose lower ISO sensitivity or 96,263
Randomly-spaced bright
turn high ISO noise reduction on.
pixels (/lnoise") appear in
• Shutter speed is slower than 8 s:
263
photos.
use long exposure noise
reduction.
_
.....................
• Camera is in focus mode C. 62
• Center focus point is not selected 64
for single-point AF or dynamic-
area AF.
AF-assist illuminator does
• [Off] selected for Custom Setting 273
not light.
a9 ([Built-in AF-assist
illuminator]).
• Illuminator has turned off -
automatically. Illuminator may
become hot with continued use;
wait for lamp to cool down.
Photos are blotched or
• Clean lens.
-
smeared.
• Clean low-pass filter.
371
• Adjust white balance to match 128
Colors are unnatural.
light source.
• Adjust [Set Picture Control] 148
settings.
Can not measure white
Subject is too dark or too bright. 139
balance.
384