The FUJIFILM EF-X500 Flash is an on-camera flash compatible with FUJIFILM X-series cameras. The FUJIFILM EF-X500 Flash is weather-resistant and is compatible with Fuji’s TTL system.The flash offers a powerful guide number of 164′ at ISO 100 and 105mm settings as well as a zoom range of 24-105mm, equivalent to 16-70mm in APS-C lenses. A pull-out diffuser is available for expanding coverage to wider 20mm, or 10mm APS-C lenses. In keeping with hybrid stills/video camera designs, and offering an alternative fill light option to the pull-out bounce card built into the flash, is an LED light.For bounce lighting, the EF-X500 can tilt from -10 to 90 and offers rotation left 135 and right 180. A major addition to this flash is full wireless master and slave TTL functionality. It uses optical pulse communication to trigger and control remote EF-X500 flashes set up in one of four channels and within three groups. Additionally, the flash has a multi-flash stroboscopic mode and runs on four AA batteries.Powerful guide number of 164′ at ISO 100 and 105mmZoom range of 24-105mm in 35mm terms, or 16-70mm for APS-C formatPull-out diffuser offers support for 20mm optics and pull-out bounce card helps provide additional fill lightDaylight-balanced color temperature of 5600KHigh-speed sync possible with select camerasManual power control of 1/1 to 1/512 in 1/3 stop stepsMulti repeating flash mode with a setting of 1-500 Hz for 2-100 flashesFlash exposure compensation of -5 to +5 EV in 1/3 EV stepsRequires master EF-X500 on the camera body for wireless operationOptical pulse communication has four channels and three groupsRuns on four AA batteries or optional EF-BP1 battery pack