Max Shutter speed
Nikon D780 can shoot continuously at max speed of
7 fps and has max shutter speed of
1/8000 sec.
Flash
Unfortunately D780 doesn't have a built-in flash but it has a flash shoe for mounting external flashes.
Focusing
Nikon D780 features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 51 focus points and 15 of these sensors are of Cross-type. Cross-type sensors locks focus faster and more accurate compared to single type sensors. Nikon D780 also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.
Focus Stacking
Macro shooters will love Nikon D780's Focus Stacking feature. In this mode, D780 automatically composites multiple shots taken at different focal positions using focus bracketing to create a single image with maximum depth of field.