Canon C83-1004 PowerShot G1 Camera User Guide - Page 44

• The fastest shutter speed for flash synchronization is 1/250 second. The camera automatically resets the shutter speed to 1/250 second if a faster speed is selected. • The flash may take up to approximately 10 seconds to charge in some cases. Actual times will vary according to usage and the battery charge. • The flash will fire at full strength in mode. • The flash will automatically adjust its output in the , and modes. • The flash setting is saved when the camera is turned off in the , , and shooting modes. • The flash will fire twice. A pre-flash will fire just before the shutter closes and will be followed by the main flash. The pre-flash is used by the camera to obtain the subject's exposure data so that the main flash can be set to the optimal intensity for the shot. About the Red-Eye Reduction Function A subject's eyes can appear red in an image shot with a flash in dim lighting due to light reflecting back from the eye's blood vessels, which is known as the red-eye phenomenon. The red-eye reduction lamp fires a soft pre-flash that causes the pupils to contract, thereby lessening the chances of the eyes appearing red when the main flash fires. - Tell human subjects to look at the lamp since the function will not have any effect if the subject is not looking at the red-eye reduction lamp. - The effect is made stronger by increasing the room lighting or by approaching closer to the subject. 42 Shooting - Letting the Camera Select Settings