Canon EOS 30D Instruction Manual

Using EOS-Dedicated, External Speedlites

108

 

Before attaching an external Speedlite, retract the built-in flash if it is 
popped up.

 

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 the <5> <7> modes).

 

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

The camera 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.

 

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