F: Bu B Exposures - Canon EOS 70DN Basic Instruction Manual

F: Bulb Exposures
In this mode, the shutter stays open as long as you hold down the
shutter button completely, and closes when you let go of the shutter
button. This is called bulb exposure. Use bulb exposures for night
scenes, fireworks, astronomical objects, and other subjects requiring
long exposures.
Elapsed exposure time
Long exposures produce more noise than usual.
If Auto ISO is set, the ISO speed will be ISO 400 (p.122).
When [z4: Long exp. noise reduction] is set to [Auto] or [Enable],
noise generated by the long exposure can be reduced (p.143).
For bulb exposures, using a tripod and a remote switch (sold separately,
p.184) is recommended.
You can also use a remote controller (sold separately, p.184) for bulb
exposures. When you press the remote controller's transmit button, the
bulb exposure will start immediately or 2 sec. later. Press the button
again to stop the bulb exposure.
1 Set the Mode Dial to <F>.
2
Set the desired aperture.
While looking at the LCD panel, turn
the <6> or <5> dial.
3 Take the picture.
The exposure will continue for as long
as you keep the shutter button
pressed completely.
The elapsed exposure time will be
displayed on the LCD panel.
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