Canon PowerShot G7 PowerShot G7 Camera User Guide Advanced - Page 51

z If the aperture value is shown in red, the image is underexposed (insufficient light) or overexposed (too much light). Use the control dial 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 when the shutter speed is 1.3 seconds or slower 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.) Using the Mode Dial z The aperture value and shutter speed change according to the zoom state as follows Aperture Value Shutter Speed (seconds) Maximum Wide Angle f/2.8 f/3.2 - 3.5 f/4.0 - 8.0 15 - 1/1600 15 - 1/2000 15 - 1/2500 Maximum Telephoto f/4.8 f/5.6 - 6.3 f/7.1 - 8.0 15 - 1/1600 15 - 1/2000 15 - 1/2500 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. Shutter Speed Display z 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 1/2500 z You can change the automatically selected combinations of shutter speeds and aperture values without altering the exposure (p. 69). 49