Bulb - Canon EOS Rebel T3 18-55mm IS II Kit Instruction Manual

a: Manual Exposure
I Using the Built-in Flash
To obtain a correct flash exposure, the flash output will be set
automatically (autoflash exposure) to match the manually-set aperture.
The flash sync speed can be set from 1/200 sec. to 30 sec. and bulb.
BULB: Bulb Exposures
Elapsed exposure time
During bulb exposures, do not point the lens toward the sun. The sun's
heat can damage the camera's internal components.
Since bulb exposures produce more noise than usual, the image might
look a little grainy.
You can reduce the noise due to long exposures by setting [3: Long exp.
noise reduction] to [1: Auto] or [2: On] in the [7 Custom Functions
(C.Fn)] (p.219).
For bulb exposures, using a tripod and Remote Switch (sold separately,
p.229) is recommended.
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A bulb exposure keeps the shutter open
for as long as you hold down the shutter
button. It can be used to photograph
fireworks, etc.
In step 2 on the preceding page, turn the
<6> dial to the left to set <BULB>.
The elapsed exposure time will be
displayed on the LCD monitor.