Using EOS-Dedicated, External Speedlites

¡ When using an external Speedlite, retract the built-in flash before mounting the external Speedlite.

¡If the EX-series Speedlite’s firing mode is set to TTL autoflash with the Custom Function, the Speedlite will not fire.

¡ If autofocus cannot be achieved, the external, EOS-dedicated Speedlite’s AF-assist beam (if the Speedlite has an AF-assist beam) will be emitted automatically (except in <3> <5> <7> modes).

¡The EOS 20D is a Type-A camera that can use all the features of EX- series Speedlites.

Using Non-Canon Flash Units

Sync Speed

The EOS 20D can synchronize with compact, non-Canon flash units at 1/250 sec. or slower shutter speeds. With large studio flash, the sync speed is 1/125 sec. or slower. Be sure to test the flash unit beforehand to make sure it synchronizes properly with the camera.

PC Terminal

¡The camera’s PC terminal is provided for flash units having a sync cord. The PC terminal is threaded to prevent inadvertent disconnection.

¡The camera’s PC terminal has no polarity so you can connect any sync cord regardless of its polarity.

¡ If the camera is used with a flash unit or flash accessory dedicated to another camera brand, the camera may not operate properly and malfunction may result.

¡Also, do not connect to the camera’s PC terminal any flash unit requiring 250 V or more.

¡Do not attach a high-voltage flash unit on the camera’s hot shoe. It might not work.

A Speedlite attached to the camera’s hot shoe and a flash unit connected to the PC terminal can be used at the same time.

98