FujiFilm X-H1 Owner's Manual page 114

Flash Photography
Red-Eye Removal
Red-eye removal is available when an option other than OFF is selected
for F FLASH SETTING > RED EYE REMOVAL and G AF/MF SETTING >
FACE/EYE DETECTION SETTING is ON. Red-eye removal minimizes "red-
eye" caused when light from the fl ash is refl ected from the subject's retinas.
Flash Sync Speed
The fl ash will synchronize with the shutter at shutter speeds of ½ 50 s or
slower.
Optional Flash Units from FUJIFILM
The camera can be used with optional FUJIFILM shoe-mounted fl ash units.
Third-Party Flash Units
Do not use third-party fl ash units that apply over 300 V to the camera hot
shoe.
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