The leaf shutter is built into the lens structure. Its most significant advantage is that it can achieve flash synchronisation at all speeds (e.g., flash sync speed of up to 1/4000s). This helps capture fast-moving subjects when a flash is used and is also helpful for wide-aperture portraits in strong lighting conditions or outdoors.
For cameras with a focal-plane shutter, when using flash, the shutter speed is limited to 1/125s or 1/250s, posing restrictions for creativity. Due to the special design of the leaf shutter, it generates significantly reduced vibration when triggered, efficiently producing quality shots.