Canon PowerShot A570IS PowerShot A570 IS Camera User Guide Advanced - Page 42

Setting the Shutter Speed Shooting Mode 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. z 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. z 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.) z The aperture value and shutter speed change according to the zoom state as follows Aperture Value Maximum f/2.6 - 3.5 Wide Angle f/4.0 - 8.0 Maximum f/5.5 - 7.1 Telephoto f/8.0 Shutter Speed (seconds) 15 - 1/1250 15 - 1/2000 15 - 1/1250 15 - 1/2000 z 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. 40