ADV
A
NCE
D
OP
ERATIONS
50
Using the Bulb Exposure Mode
Purpose
This mode is useful for the long exposures required for
shooting night scenes and fireworks. The shutter remains
open as long as the shutter release button is held down.
To set
1. Set the lens aperture ring to the desired f-
stop other than
b
while holding down the
aperture-A lock button.
•
Do not set the lens aperture ring to
b
. lf doing so, the
aperture will always closed to the maximum position.
2. Set the shutter speed dial to
c
.
3. An appropriate aperture will be displayed in
the viewfinder when the shutter release but-
ton is pressed halfway.
•
Set the shutter speed dial to the
c
position. Turn
the shutter speed dial while holding down the
shutter speed dial lock button.
•
The approximate aperture indication appears in
the viewfinder. It may not the same indication as
that you selected with the lens aperture ring espe-
cially when the A645 150mm f/3.5 or A 645 45-
85mm Zoom f/4.5 is attached.
1
2
3
Содержание 645 NII
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