Canon PowerShot G12 PowerShot G12 Camera User Guide - Page 106

Setting the Shutter Speed and Aperture Value Safety Shift With M and B modes, if you press the n button to display the 4 tab and set [Safety Shift] to [On], the shutter speed or aperture value is automatically adjusted for the correct exposure when it cannot otherwise be obtained. Safety Shift is disabled when the flash is enabled. You can also set the camera so that turning the ÷ or Ê dial changes the shutter speed (p. 171). Setting the Shutter Speed and Aperture Value You can manually set the shutter speed and aperture to shoot images. D stands for "Manual". Set the mode dial to D. Aperture Value Shutter Speed Standard Exposure Level Exposure Level Make the setting. ● Turn the ÷ dial to set the shutter speed. ● Turn the Ê dial to set the aperture value. X The set exposure level appears on the indicator. You can check the difference against the standard exposure level. X When the difference is more than ±2 stops, the set exposure level appears in orange. When you press the shutter button halfway, "-2" or "+2" appears in orange. Exposure Level Indicator 106