Max Shutter speed
Panasonic G7 can shoot continuously at max speed of
7.0 fps and has max shutter speed of
1/4000 sec. G7 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
G7 has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Focusing
Panasonic G7 features a Contrast Detection autofocusing system. The AF system has 49 points to choose from.
Panasonic G7 also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.
Post Focus
Panasonic G7 has a special Post Focus mode which uses its 4K video and focus bracketing features together to shoot and stack a burst of images into a single image which you can change the focus point on the LCD screen after it is taken.