The EF-X500 is a hot-shoe mount flash with the maximum guide number of approx. 50*. High-speed flash synchronization, FP mode, offers the flash at any shutter speed. This means you can concentrate on shooting even when a faster shutter speed is required, for example, in order to use a near-maximum aperture to produce beautiful bokeh.The EF-X500 also features wireless multi-flash TTL auto function. Setting up multiple flashes and freely controling light on a subject and background offer a creative result. The TTL auto function is available with multi-flash setup as well as single flash, so that you can start shooting without making additional adjustments to light output.With cameras equipped with a focal plane shutter, when the shutter speed is high, the first and second shutter curtains move across at the same time, making the exposure through a narrow vertical slit between them. It prevented light from a conventional flash to reach only a small section of the sensor. This is why a slower shutter speed must be used in flash photography, with the range of available shutter speeds severely limited.The EF-X500 supports the FP mode (high-speed flash sync), in which the flash outputs continuous light while the first and second curtains travel across the sensor, thereby enabling flash photography at any shutter speed.When shooting with a near-maximum aperture to create beautiful bokeh, the shutter speed tends to go higher. The EF-X500 frees photographers from being conscious about shutter speed limitations, and allows them to focus on shooting. Type Type Hot-shoe mount flash Model number EF-X500 Compatible cameras *** FUJIFILM X-T1, X-T2, X-Pro2 Some functions are available also for other X Series cameras equipped with a hot shoe, and FinePixHS20EXR„ÄÅHS30EXR„ÄÅHS50EXR. Flash head Guide number Up to approx. 50 (ISO100ÔΩ•m) / 164 (ISO100•ft) (at illumination angle of 105mm*4) Flash coverage 24mm-105mm *4, Auto Zoom function, Approx. 20mm when using the Wide Panel*4 Bounce 90°up, 10°down, 135°left and 180°right Color temperature Approx. 5600K (at full output) FP (high speed flash sync) mode Supported*5 Exposure control Exposure control system TTL, Manual, Multi-flash (Manual) TTL compensation -5.0EV - +5.0EV at 1/3-step increments *This setting may not be reflected in some shooting conditions. Manual flash power 1/1ÔΩû1/512 at 1/3-step increments *Flash settings become slightly restricted in the FP mode. Multi-flash power 1/4ÔΩû1/512 at 1/3-step increments Charge Firing interval (at full power and full charge) Approx. 2.5 seconds (Nickel-hydrogen battery) Number of flashes (at full power and full charge) Approx. 170 times (Nickel-hydrogen battery) Wireless multi-flash system Communication method Optical transmission Operation modes Master (TTL / Manual / Multi-Flash / OFF) Slave (TTL / Manual / Multi-Flash / OFF) Communication channels Ch1 - 4 Slave unit groups Up to 3 groups (A / B / C) Other functions Wireless slave flash Supported (P-MODE /N-MODE) LED video light Supported (built-in) LED AF assist light / catchlight Supported (built-in) Reflector panel Supported (built-in) Diffuser Supported (included) Included items Included items Soft case Mini stand Diffuser Power source Power source Four AA batteries (LR6 or Ni-MH) External power source Battery Pack EF-BP1 (optional) Dimensions and weight Dimensions Approx. 124.0mm (H) x 67.2mm (W) x 107.3mm (D) Weight Approx. 380g (excluding batteries)