Flash Photography with the EOS-Dedicated 550EX Speedlite

FE Lock

The procedure for setting FE lock is the same as with the built-in flash (90). FE lock works in both the normal flash and high-speed sync (FP flash) modes.

Flash Exposure Compensation

For flash pictures with flash exposure compensation, see “Flash Exposure Compensation” for the built-in flash. (91)

Modeling Flash

Modeling flash allows you to see shadows, light balance, and other effects produced by multi- light settings.

Check that the camera and1 Speedlite are properly set for flash photography.Press the camera’s depth-of-field2 preview button.

The Speedlite fires at 70Hz for approximately one second.

Wireless Multi-Flash/E-TTL Autoflash Shooting

The 550EX Speedlite can be operated as a slave light from a master (550EX or ST-E2) for easy wireless multi-flash/E-TTL autoflash photography. The slave 550EX is placed to supplement the master flash, which provides the primary flash for the subject.

This is a Type-A camera. For details, refer to the instractions for your master Speedlite.

Macro Ring Lite MR-14EX and Macro Twin Lite MT-24EX can also be used as the master unit, and Speedlite 420EX can also be used as a slave unit.

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Photography Flash

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