Nikon D3100 D3100 User's Manual - Page 94

❚❚ Long Time-Exposures (M Mode Only) At a shutter speed of "bulb," the shutter remains open while the shutter-release button is held down. This can be used for long time-exposure photographs of moving lights, the stars, night scenery, or fireworks. A tripod or optional MC-DC2 remote cord (0 177) is recommended to prevent blur. Length of exposure: 35 s Aperture: f/25 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-EL14 battery or an optional EH-5a AC adapter and EP-5A power connector. Note that noise (randomly-spaced bright pixels or fog) may be present in long exposures; before shooting, choose On for the Noise reduction option in the shooting menu (0 134). 2 Rotate the mode dial to M. Mode dial t 3 Choose a shutter speed. Rotate the command dial until "Bulb" (A) appears in the viewfinder or information display. Command dial 4 Open the shutter. After focusing, press the shutter-release button all the way down. Keep the shutter-release button pressed until the exposure is complete. 5 Close the shutter. Take your finger off the shutter-release button. A Self-timer Mode In self-timer mode, a shutter speed of "Bulb" is equivalent to approximately 1/10 s. 78