The new firmware updates incorporate the following issues:
We identified the phenomena below, which could arise in rare instances when certain EF-X500 units are in stand-by mode and when a communication error occurs between the camera and this flash unit.
The phenomena below could occur in the aforementioned instances:
1. The applicable EF-X500 flash unit does not properly respond to turn on from stand-by mode.
2. The alkaline batteries may become increasingly hot. If you try to take the batteries out of the EF-X500 flash unit without turning the flash off and/or disconnecting the flash unit from the camera and letting the batteries cool down, a skin burn could occur.
A firmware update is now available to address and prevent this potential occurrence in relevant EF-X500 units.
How to upgrade the firmware
1. For EF-X500 owners who have X-T1, X-T2 or X-Pro2:
Update the firmware for X-T1,X-T2 or X-Pro2 first, then upgrade the firmware for EF-X500.
2. For EF-X500 owners who do not have the X-T1, X-T2 nor X-Pro2:
Please contact your local FUJIFILM support center.