The maximum sync speed for this camera is 1/200. However, with the 5600HS(D), 5400HS, and 3600HS(D) accessory flashes (sold separately) shutter speeds up to 1/8000 can be used. High-speed sync (HSS) allows faster shutter speeds when fill flash is used on moving subjects outdoors. HSS also lets you use large aperture/high shutter speed combinations to separate your subject from the background by limiting the depth-of-field.