Stroboscopic Flash

2 Press the < > button to select the firing frequency, flash count, or flash output display. When selected, the respective item blinks on the LCD panel to indicate that it can be altered. Pressing the

< > button changes the blinking item in the following loop:

Firing frequency Flash countFlash output (Normal display)

3 Press the < > or < > button to set the desired value for the blinking item.

4 Press the < > button again to register the value. The item will then stop blinking and remain displayed. The next item will then start blinking. Repeat steps 3 and 4 to set the next item.

• After you set the flash output and press the

< > button, the firing frequency, flash count, and flash output are displayed.

Shooting With Stroboscopic Flash

To shoot with stroboscopic flash, you must set a shutter speed that gives the 550EX enough time to fire according to the firing frequency and flash count you have set.

1 Set the camera’s picture-taking mode to M and set the desired aperture.

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Canon 550EX manual Shooting With Stroboscopic Flash