Max Shutter speed
Olympus TG-3 can shoot continuously at max speed of
5 fps and has max shutter speed of
1/2000 sec.
Flash
Unfortunately TG-3 doesn't have an external flash shoe so you are limited with the built-in flash.
Focusing
Olympus TG-3 features a Contrast Detection autofocusing system.
Olympus TG-3 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 Olympus TG-3's Focus Stacking feature. In this mode, TG-3 automatically composites multiple shots taken at different focal positions using focus bracketing to create a single image with maximum depth of field.