Canon S3IS PowerShot S3 IS Camera User Guide Advanced - Page 62
Manually Setting the Shutter Speed and Aperture
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Aperture Setting Display z The larger the aperture value the smaller the lens opening, allowing less light to enter the camera. F2.7 F3.2 F3.5 F4.0 F4.5 F5.0 F5.6 F6.3 F7.1 F8.0 z You can change the combinations of shutter speeds and aperture values without altering the exposure (p. 70). Safety Shift With and modes, if [Safety Shift] is turned [On] in the Rec. menu, the shutter speed or aperture value is automatically adjusted for the correct exposure when it cannot be otherwise obtained. z Safety Shift is disabled when the flash is enabled. Manually Setting the Shutter Speed and Aperture Shooting Mode You can manually set the shutter speed and aperture to shoot images. 1 Use the W or X button to select the shutter speed, and use the S or T button to select the aperture value, then shoot. z When you press the shutter button halfway, the difference between the standard exposure* and the selected exposure appears on the LCD monitor (or viewfinder). If the difference is more than 2 stops, "-2" or "+2" appears on the LCD monitor (or viewfinder) in red. * The standard exposure is calculated by measuring the brightness according to the selected metering method. z If the zoom is adjusted after these values are set, the aperture value or the shutter speed may change in accordance with the zoom position. z The brightness of the LCD monitor (or viewfinder) matches the selected shutter speed and aperture value. When you select a fast shutter speed or shoot a subject in a dark place, raise the flash, and then set it to (Flash On with red-eye reduction) or (Flash On), the image will always be bright. 60