Canon EOS-1D X EOS-1D Instructions - Page 114
Using Non-Canon Flash Units
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Using Non-Canon Flash Units Sync Speed The EOS-1D can synchronize with compact, non-Canon flash units at 1/500 sec. or slower shutter speeds. With large studio flash, the sync speed is 1/125 sec. or slower. Be sure to test the flash to see if 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 is compatible with any sync cord regardless of the polarity. • If the camera is used with a flash unit or flash accessory dedicated to a another camera brand, the camera may not operate properly and camera malfunction may result. Also, do not connect to the camera's PC terminal any flash unit requiring 250 V or more. • Do not use a high voltage flash on the hot shoe. It might not fire. A flash unit attached to the camera's hot shoe and a flash unit connected to the PC terminal can be used at the same time. 114