Canon EOS 90D, Advanced User'S Manual

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180
M
Wireless Flash Photography Using
Optical Transmission
You can use the built-in fl ash as the sender for external Canon Speedlites
compatible with optical wireless fl ash photography to shoot with wireless
multiple-fl ash lighting.
Receiver Setup and Positioning
Referring to the instruction manual of the external Speedlite (receiver),
confi gure the following settings.

Set up the Speedlite as a receiver.

Set the camera and Speedlite to the same channel.

To control the fl ash ratio, set the receiver’s fl ash group.

Position the camera and receiver within the following range.

Arrange the receiver with its wireless sensor facing the camera.
Approx. 80°
Approx. 7 m
Approx. 5 m
Approx. 10 m
Outdoors
Indoors
Approx. 7 m
Canceling Receiver Auto Power Off
Press the camera’s <
A
> button. For manual fl ash, cancel by pressing the
receiver’s test fl ash button.