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meters) at both sides. These ranges may vary, depending on the ambient light.
• The flash head should not be aimed directly into the camera lens.
• The wireless sensors are located on the front of the VS-570C. Make sure that the sensor is facing the master flash
and that there is no obstruction between the two units.
• When photographing outdoors or in bright ambient light, the sensors can be overwhelmed by ambient light, which
will lower their sensitivity.
• To avoid creating interference between flash units, using more than three in a single group is not recommended.
Upgrading the Firmware on the VS-570C
In order to ensure compatibility with future cameras, the VS-570C's firmware may be updated. This can be
done to ensure proper communication with new cameras or to add new features.
Visit www.boltflashes.com/firmware to check if a new firmware version has been released. Follow the online
instructions to upgrade.
Upgrading the Firmware on the VS-570C
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