Canon PowerShot A530 用户手册

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页码 139
45
Sh
oo
ting
When you set the shutter speed, the camera automatically selects 
an aperture value to match the brightness of the subject. Faster 
shutter speeds allow you to catch an instantaneous image of a 
moving subject, while slower speeds create a flowing effect and 
allow you to shoot without a flash in dark areas.
 Setting the Shutter Speed
PowerShot A540
!
If the aperture value is shown in red, the image is 
underexposed (insufficient light) or overexposed (too much 
light). Use the 
 or 
 button to adjust the shutter speed 
until the aperture value shows in white.
!
The nature of CCD image sensors is such that noise in the 
recorded image increases at slow shutter speeds. This 
camera, however, applies special processing to images 
shot at shutter speeds slower than 1.3 seconds to 
eliminate the noise, thereby producing high-quality images. 
(However, a certain amount of processing time may be 
required before the next image can be shot.)
!
The fastest shutter speed for flash synchronization is 1/500 
second. The camera automatically resets the shutter speed 
to 1/500 second if a faster speed is selected.
Shutter Speed Display
!
The following shutter speeds can be set. 1/160 indicates 1/160 
second. Also, 0"3 indicates 0.3 second and 2" indicates 
2 seconds.
15" 13" 10" 8" 6" 5" 4" 3"2 2"5 2" 1"6 1"3 1" 0"8 0"6 0"5 0"4 0"3 
1/4 1/5 1/6 1/8 1/10 1/13 1/15 1/20 1/25 1/30 1/40 1/50 1/60 
1/80 1/100 1/125 1/160 1/200 1/250 1/320 1/400 1/500 1/640 
1/800 1/1000 1/1250 1/1600 1/2000