Canon EOS 60D - Manual (Page 149)

149
External Speedlites
Sync Speed
The camera can synchronize with non-Canon compact flash units at
1/250 sec. and slower speeds. With large studio flash units, since the
flash duration is longer than compact flash units, set the sync speed
within 1/60 sec. to 1/30 sec. Be sure to test the flash synchronization
before shooting.
Cautions for Live View shooting
If you use a non-Canon flash with Live View shooting, set [z Silent
shooting] to [Disable] (p.159). The flash will not fire if it is set to [Mode
1] or [Mode 2].
Using Non-Canon Flash Units
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.
The camera does not have a PC terminal.
Do not attach a high-voltage flash unit on the camera’s hot shoe. It might
not fire.