Max Shutter speed
Canon 50D can shoot continuously at max speed of 6.3 fps
and has max shutter speed of 1/8000 sec
50D has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Canon 50D features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 9 points to choose from. Canon 50D also features Face detection AF
where it intelligently detects the faces in the frame and locks the focus automatically.
You can download Canon 50D's User Manual here