Canon EF-M - Manual (Page 55)

The shutter stays open for as long as you
press the shutter button. Use this mode
when long exposures are required such
as for night scenes and fireworks
displays.
When using bulb mode, mount the
camera securely on a tripod to prevent
camera movement during exposure.
1) Set the shutter dial to “B”.
2) Set the aperture dial to the desired
aperture value.
3) Look through the viewfinder and focus
the subject.
4) Press the shutter button for the neces­
sary length of time.
* The viewfinder display turns off during
the exposure.
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