Canon EOS R50 Mirrorless Camera (White) - Manual (Page 171)

Non-Canon Flash Units
Sync speed
The camera can synchronize with non-Canon compact flash units at up to 1/250 sec.
With large studio flash units, the flash duration is longer than that of a compact flash unit
and varies depending on the model. Before shooting, confirm that flash sync is
performed correctly by taking some test shots at a sync speed of approx. 1/60 sec. to
1/30 sec.
Caution
Manually lower the built-in flash before attaching an external flash unit.
Using the camera with a dedicated flash unit or flash accessory for cameras of
other manufacturers poses a risk of malfunction and even damage.
Do not attach a high-voltage flash unit to the camera's multi-function shoe. It may
not fire.
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