Nikon D3000 Reference Manual page 61

D
The AF-Assist Illuminator
If the subject is poorly lit, the AF-assist illuminator will light
automatically to assist the autofocus operation when the shutter-
release button is pressed halfway. The AF-assist illuminator will not
light:
• During continuous-servo autofocus or manual focus
• In shooting modes in which the AF-assist illuminator can not be
used (0 176)
• If Off has been selected for the AF-assist option in the shooting
menu (0 122)
The illuminator has a range of about 0.5–3.0 m (1 ft. 8 in.–9 ft. 10 in.); when using the
illuminator, use a lens with a focal length of 18–200 mm and remove the lens hood.
A
Focus Mode
Focus mode can also be selected from the shooting menu (0 119).
A
The Beep Speaker
The Beep option in the setup menu (0 131) can be used to turn the beep speaker on or off.
AF-assist illuminator
z
43