Canon Speedlite 430EX III-RT Instruction Manual - Page 18
Turning on the Power, Set the power switch to <, >., Check that the flash is ready., Quick Flash - camera flash
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Turning on the Power 1 Set the power switch to . X The flash recycling starts. X During recycling, is displayed on the LCD panel. When flash recycling is complete, this indicator disappears. 2 Check that the flash is ready. The status of the flash-ready lamp changes from off to green (Quick flash ready) to red (fully charged). You can press the test flash button (flash-ready lamp) to fire a test flash. Quick Flash The Quick flash function enables flash shooting when the flash-ready lamp is lit green (before the flash is fully charged). Quick flash is available regardless of the camera's drive mode setting. The flash output will be approx. 1/2 to 1/3 of the full output, but it is effective for shooting with a shorter firing interval. During manual flash shooting, this function is available when the flash output is set to 1/4 to 1/128. Note that you cannot use Quick flash during wireless flash shooting. Auto Power Off To save battery power, the power will turn off automatically after approx. 90 sec. of idle use. To turn on the Speedlite again, press the camera's shutter button halfway or press the test flash button (flash-ready lamp). During radio transmission wireless master flash shooting (p.57) or during linked shooting (p.69), the time until auto power off takes effect is approx. 5 min. A test flash cannot be fired when the camera's 3/1/o/7/2 timer is active. For the display of when set as the master unit during radio transmission wireless shooting, see page 54. 18