Canon C83-1004 PowerShot G1 Camera User Guide - Page 110

Using an Externally Mounted Flash (Optional) You can make your flash photography even clearer and more natural appearing with the use of a separately sold externally mounted flash. The camera's auto exposure function will operate with a Canon Speedlite 220EX, 380EX, 420EX or 550EX. Other flashes will fire at full strength. Non-Canon brand flashes may not fire. Please check the manual for your flash. (Certain functions noted in the manuals for the Speedlite 220EX, 380EX, 420EX and 550EX cannot be performed when mounted on this camera. Please read this guide before using one of these flashes on the camera.) Speedlite 420EX Mounted on the Hot Shoe 1 Attach the flash to the camera's hot shoe. 2 Turn the external flash on and turn the camera's main dial to . 3 Turn the mode dial to a mode other than or . Speedlite 220EX, 380EX, 420EX or 550EX • The flash will automatically adjust its output in the and modes. The maximum flash synchro shutter speed is 1/250 second. • The flash will fire at full strength in mode. Manually set the shutter speed and aperture to appropriate settings in this mode. At shutter speeds slower than 1/250 second (maximum flash synchro shutter speed) determine the appropriate aperture value setting from the flash's guide number and the distance to the subject. You are also recommended to set the white balance to the setting. 108 Using an Externally Mounted Flash (Optional)