Fujifilm X-T2, X-T1, and X-Pro2 Firmware Update
1.Accessory option is added in firmware upgrade function. With this upgrade, firmware of accessory like Shoe Mount Flash can be upgraded with the camera.
<Important notice for Shoe Mount Flash EF-X500 owners>
The firmware for the EF-X500 is upgraded.
The serial numbers of the flashes which requires this firmware update can be checked in the searching form from the link below .
Update the firmware for X-T1,X-T2 or X-Pro2 first, then upgrade the firmware for EF-X500.
Fujifilm EF-X500 Firmware Update
1.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.
You can check if your flash needs the firmware update here, but you might as well upgrade.