Nikon D3000 Reference Manual page 90

Long Time-Exposures (M Mode Only)
Shutter speeds of "bulb" and "time" can be used
for long time-exposure photographs of moving
lights, the stars, night scenery, or fireworks. To
prevent blurring caused by camera shake, use a
tripod and an optional remote control (0 167).
Shutter speed
Shutter remains open while shutter-release button is held down. Tripod is
Bulb
recommended to prevent blur.
Optional ML-L3 wireless remote control required (
Time shutter-release button on remote control is pressed and remains open for about
thirty minutes or until shutter-release button is pressed a second time.
1
Ready the camera.
Mount the camera on a tripod or place it on a stable, level surface. To prevent
loss of power before the exposure is complete, use a fully charged EN-EL9a
battery or an optional EH-5a AC adapter and EP-5 power connector. Note that
t
noise may be present in long exposures; before shooting, choose On for the
Noise reduction option in the shooting menu (0 122).
2
Rotate the mode dial to M.
3
Choose a shutter speed.
Rotate the command dial until "Bulb"
(A) appears in the viewfinder or
information display. For a shutter speed of
"Time" (&), select delayed remote or quick-
response remote mode after choosing the
shutter speed (0 53).
72
Length of exposure: 35 s
Aperture: f/25
Description
0
167). Shutter opens when
Mode dial
Command dial