Among all of its new cameras announcements, Fujifilm also made public the development of a new external flash. The EF-X500 is a high-end, weather-sealed model with a guide number of 50m at ISO 100, the ability to control up to three sets of TTL off-camera strobes, and a high-speed sync mode that supports the X-Pro2's maximum 1/8000 sec shutter speed. The zoom head range is 24-105mm equiv., and can go as wide as 20mm with the wide panel pulled into place. 

It has a large, backlit display on its back side along with a control dial for easy setting adjustment. As you'd expect, the flash can tilt and rotate - 10° down, 90° up, 135° left and 180° right. It uses four AA batteries and also supports Fujifilm's EF-BP1 external battery pack.

The EF-X500 is expected to ship in May at a price yet to be determined.

Press Release:

FUJIFILM ANNOUNCES THE DEVELOPMENT OF A NEW HOT-SHOE MOUNT FLASH FOR X-SERIES CAMERAS

A new high-end external flash is being developed to complement FUJIFILM X cameras with high-speed synchronization and multiple flash TTL auto functions

Valhalla, N.Y., January 14, 2016 – FUJIFILM North America Corporation, a leader in premium mirrorless cameras, today announced that it is developing a new high-end external shoe mount flash, the FUJIFILM EF-X500. The EF-X500 allows users to expand their photography with high-speed synchronization and multiple flash TTL auto functions. It will be added to the premium X-Series camera accessory line-up in May 2016. Price to be confirmed.

Designed with FUJIFILM X cameras in mind
The new FUJIFILM EF-X500 external flash will feature a low-profile, premium design that is perfectly suited to complement the style of the compact and lightweight X-Series cameras.

With high-speed synchronization (FP), the new EF-X500 supports the 1/8000 sec. shutter speed featured in the new, flagship model FUJIFILM X-Pro2, as well as other Fujifilm X cameras.

The multiple flash-unit TTL auto function unleashes users' creativity by allowing them to control any lighting conditions so it will accompany their X-Series camera in all low light and studio applications.

Fujifilm has added a weather and dust resistant build making the EF-X500 flash the perfect companion for the FUJIFILM X-T1 and X-Pro2 to further enhance their rugged, weather resistant capabilities.

Specifications

Type Hot-shoe mount flash
Guide Number 50/164 (ISO100・m/ft.) at 105 mm zoom head position, equivalent to 35mm format.
Zoom 24mm-105mm equivalent to 35mm format.
When the extendable wide panel is pulled out, the flash coverage is approx.. 20 mm.
Bounce capability Flash head tilts down to 10° or up to 90° and rotates horizontally 135° to the left and 180° to the right.
Color temperature Approx. 5600K
Flash modes TTL / Manual / Multi.(repeating flash)
Flash exposure compensation -5.0 - +5.0, 1/3 step
(The available range and step depend on camera models)
High-speed synchronisation (FP) Capable (supported camera only)
Manual 1/1 - 1/512, 1/3 step

Multi.(repeating flash)

1/4 - 1/512, 1/3 step, 1-500Hz, 2 – 100 flashes
Wireless communication type Optical pulse communication (in multiple flash-unit photography operation)
Wireless modes Master and Remote
Communication cannels From 1 to 4.
Remote groups Up to three groups (A/B/C)
Power source Four LR6 (AA-size) alkaline batteries,
four FR6 (AA-size) lithium batteries, or
four HR6 (AA-size) rechargeable Ni-MH batteries
(optional).
External Power Source BATTERY PACK EF-BP1 (optional)
Dimensions W67.5 x H123.9 x D106 (mm)

* Specifications subject to change without notice.