Nikon D40 manual Reference P, S, A, and M Modes/Mode M Manual, Long Time-Exposures, 35s, f/25

Long Time-Exposures

Shutter speeds of “bulb” and “--” can be used for long time-exposure photographs of mov- ing lights, the stars, night scenery, or fireworks. To prevent blurring caused by camera shake, use a tripod or an optional remote control ( 33, 103).

Shutter speed	Description
bulb	Shutter remains open while the shutter-release button is held down.
	Optional remote control required. Select mode M, choose a shutter speed of “bulb,” and
--	then select delayed remote or quick-response remote mode ( 33). Shutter opens
	when the shutter-release button on the remote control is pressed and remains open for
	thirty minutes or until the button is pressed a second time.

35s, f/25

To prevent loss of power before the exposure is complete, use a fully charged battery or an optional EH-5 or EH-5a AC adapter with an EP-5 power connector ( 103). Note that noise may be present in long exposures; before shooting, choose On for the Noise reduction option in the shooting menu.

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Reference: P, S, A, and M Modes/Mode M (Manual)