External Flash Metering

The flash reflected off the subject is metered by an external metering sensor in real time. When the standard flash exposure is attained, the flash output is cutoff automatically. Auto external metering compatible with the EOS-1D Mark III and manual external metering compatible with all EOS cameras are provided.

8: Auto External Metering

Set auto external metering.

Set the Speedlite Custom Function to

C.Fn-05-2. (p.27)

With auto external metering, the camera’s ISO speed and aperture will be set automatically in real-time by the Speedlite.

Auto external metering will also work with flash exposure compensation (p.14) and FEB (p.15).

8q: Manual External Metering

1 Set manual external metering. Set the Speedlite Custom Function to C.Fn-05-3. (p.27)

2 Set the Speedlite to the camera’s ISO speed.

Press the <8> button so the ISO speed blinks.

Turn the <9> dial to set the ISO speed, then press the <8> button.

30