Canon EOS 600 - Manual (Page 77)

BULB (LONG EXPOSURE)
Use the bulb mode for exposures longer than
30 seconds like astro or night photography
1) Set the shooting mode to “M”.
2) Turn the electronic input dial until “buLb”
(next to 30") displays
3) Set the aperture value by turning the electron­
ic input dial while pressing the manual aper­
ture set button.
The camera requires relatively little power in
the bulb mode saving battery usage
Bulb operation time displays by a series of
three bars and numbers from 1 to 30, Each
bar mark indicates 30 seconds. Maximum
exposure time display is 120 seconds (three
bars and 30).
Bulb cannot be used with auto exposure
bracketing.