Nikon a Verweishandbuch

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Can not select AF-area mode
: Camera is in 
i mode (0 29).
Image size can not be changed
: An NEF (RAW) option is selected for image 
quality (
Camera is slow to record photos
: Turn long exposure noise reduction off 
Noise (bright spots, randomly-spaced bright pixels, fog, or lines) appear in photos
:
• Choose lower ISO sensitivity or turn high ISO noise reduction on 
• Shutter speed is slower than 1 s: use long exposure noise reduction 
• Turn Active D-Lighting off to avoid heightening the effects of noise 
AF-assist illuminator does not light:
• 
The AF-assist illuminator does not light if the subject is brightly lit.
• The AF-assist illuminator does not light in some autofocus, AF-area, and 
scene modes.
• Off selected for Built-in AF-assist illuminator in the shooting menu 
Smudges appear in photographs
: Clean lens.
Sound is not recorded with movies
Off is selected for Movie settings > 
Microphone (
The brightness of the image in the monitor differs from the final photograph
:
• Center-weighted or spot metering is selected (0 85).
• The camera is in mode M.
• The subject is too bright or too dark.
• Active D-Lighting is in effect (0 110).
• The flash is used (0 116).
The monitor is dark
: Increase monitor brightness (
Flicker or banding appears during in the monitor during shooting
: Choose an option 
for Flicker reduction that matches the frequency of the local AC power 
supply (
Bright bands appear in the monitor
: A flashing sign, flash, or other light source 
with brief duration was used during shooting.
Menu item can not be selected
: Some options are not available in all modes.