Max Shutter speed
Canon G3 X can shoot continuously at max speed of
5.9 fps and has max shutter speed of
1/2000 sec.
Flash
G3 X has a built-in flash, and it also has a flash shoe to mount your external flashes too.
One neat feature that we like about G3 X's built-in flash has is that the flash head can be tilted upwards manually using your finger, which can be used to bounce the flash light and create a more pleasing lighting on your subject. It is not a very strong flash so the ceiling/wall or the surface you use for bouncing must be relatively close to the camera.
Focusing
Canon G3 X features a Contrast Detection autofocusing system. The AF system has 31 points to choose from.
Canon G3 X also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.