Most modern cameras offer both. Knowing when to use each matters.

Mechanical shutter:

A physical curtain moves across the sensor. Makes the familiar click. Highest sync speed (usually 1/180–1/250 for flash). No rolling shutter distortion on fast-moving subjects. Limited to camera's maximum speed (usually 1/4000–1/8000).

Electronic shutter (silent):

No moving parts. Completely silent — important for discretion on the street. Can reach very high shutter speeds (1/32000 or higher). No mechanical wear. But: potential rolling shutter distortion on fast movement (propellers, fast-moving vehicles), and no flash sync (or limited sync at reduced speeds).

Street recommendations:

Use electronic for: candid work where silence matters, bright light requiring very fast shutter speeds, museum interiors, courtrooms, ceremonies.

Use mechanical for: flash work (always), fast-moving subjects where distortion would be obvious, unpredictable mixed light environments.

Electronic front curtain shutter (EFCS): a useful middle ground — silent first curtain, mechanical second. Faster and quieter than full mechanical, avoids rolling shutter on the exposure. Most modern cameras offer this. It's a good default for street without flash.