Canon 550EX manual Modeling Flash, Press the camera’s depth-of-field preview button

10. Modeling Flash

When the 550EX is used with the EOS-1D, 1V, 3, D60, D30, ELAN 7/7E, and 30/33, a modeling flash can be fired so you can check the lighting and shadow effects before you take the picture.

Set the desired flash photography settings with the camera and 550EX.

Press the camera’s depth-of-field preview button.

• The aperture will stop down.

• The 550EX will fire a series of flashes at 70 Hz for 1 sec.

CF Custom Function CF-6 can disable the modeling flash and prevent it from firing. See page 113.

To prevent overheating and deterioration of the flash head, do not fire the modeling flash more than 10 times in succession. After 10 times, allow the 550EX to cool for at least 10 minutes.

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