Max Shutter speed
Fujifilm XF10 can shoot continuously at max speed of
6.0 fps and has max shutter speed of
1/4000 sec. XF10 also has an electronic shutter which can shoot silently at max speed of
1/16000s. One thing to keep in mind is that electronic shutter may cause rolling shutter / jello effects, and also banding issues under artificial light on your images.
Flash
Unfortunately XF10 doesn't have an external flash shoe so you are limited with the built-in flash.
Focusing
Fujifilm XF10 features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 91 points to choose from. Fujifilm XF10 also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.