45ShootingWhen you set the shutter speed, the camera automatically selectsan aperture value to match the brightness of the subject. Fastershutter speeds allow you to catch an instantaneous image of amoving subject, while slower speeds create a flowing effect andallow you to shoot without a flash in dark areas.Setting the Shutter SpeedPowerShot A540z If the aperture value is shown in red, the image isunderexposed (insufficient light) or overexposed (too muchlight). Use the or button to adjust the shutter speeduntil the aperture value shows in white.z The nature of CCD image sensors is such that noise in therecorded image increases at slow shutter speeds. Thiscamera, however, applies special processing to imagesshot at shutter speeds slower than 1.3 seconds toeliminate the noise, thereby producing high-quality images.(However, a certain amount of processing time may berequired before the next image can be shot.)z The fastest shutter speed for flash synchronization is 1/500second. The camera automatically resets the shutter speedto 1/500 second if a faster speed is selected.Shutter Speed Displayz The following shutter speeds can be set. 1/160 indicates 1/160second. Also, 0"3 indicates 0.3 second and 2" indicates 2seconds.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"31/4 1/5 1/6 1/8 1/10 1/13 1/15 1/20 1/25 1/30 1/40 1/50 1/601/80 1/100 1/125 1/160 1/200 1/250 1/320 1/400 1/500 1/6401/800 1/1000 1/1250 1/1600 1/2000
