Canon EOS 5D Mark IV L-series Zoom Lens Kit Owner's Manual

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D
 Flash Photography
288
 
Sync Speed
The camera can synchronize with non-Canon compact flash units at 
1/200 sec. and slower speeds. With large studio flash units, the flash 
duration is longer than that of a compact flash unit and varies 
depending on the model. Be sure to check before shooting if flash 
sync is properly performed by test shooting at a sync speed of 
approx. 1/60 sec. to 1/30 sec.
 
PC Terminal
 
The camera’s PC terminal can be 
used with flash units having a sync 
cord. The terminal has locking 
threads to prevent the cord from 
falling off.
 
The camera’s PC terminal has no 
polarity. You can connect any sync 
cord regardless of its polarity.
 
Cautions for Live View Shooting
If you use a non-Canon flash unit with Live View shooting, set [z6: 
Silent LV shoot.
] to [Disable] (p.312). The flash will not be fired if it 
is set to [Mode 1] or [Mode 2].
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.
 
Do not connect to the camera’s PC terminal any flash unit with an output 
voltage of 250 V or more.
 
Do not attach a high-voltage flash unit to the camera’s hot shoe. It may 
not be fired.
A flash unit attached to the camera’s hot shoe and a flash unit connected to 
the PC terminal can both be used at the same time.