Canon EOS 7D Mark II (G) Instruction Manual page 232

F: Bulb Exposures
Elapsed exposure time
If you press the shutter button completely while the bulb timer is
operating, the bulb exposure will stop.
Doing any of the following will cancel the bulb timer (reverts to
[Disable]): Set the power switch to <2>, display the movie shooting
screen, or change the shooting mode from <F>.
232
Set the desired exposure time.
3
Select [OK].
4
Take the picture.
5
Bulb timer
Select the hour, minute, or second.
Press <0> so <r> is displayed.
Set the desired number, then press
<0> (Returns to <s>).
The set time will be displayed on the
menu screen.
<J> will be displayed on the LCD
panel.
Press the shutter button completely,
and the bulb exposure will start and
continue until the set time elapses.
To cancel the timer setting, set
[Disable] in step 2.