Canon QL19 - Manual (Page 31)

IB (BULB)
exposure
!
________ »V
B stands for bulb exposure Since the shut
ter remains open as long as the shutter
button is being pressed, it is used for long
exposures exceeding 1 sec.
1 The aperture ring is released from AUTO
and set a desired aperture stop.
2 Keep the safety stopper release lever in
pressed state
3 Turn the shutter speed ring and match B
to the indicator.
4 Wind the film advance lever and press
the shutter button. The B exposure works
while the shutter button which keeps the
20 shutter open is being pressed.