are exposure and shutter speed the same thing
In photography, shutter speed or exposure time is the length of time when the film or digital sensor inside the camera is exposed to light, also when a camera's shutter is open when taking a photograph. The amount of light that reaches the film or image sensor is proportional to the exposure time. ​⁄ of a second will let half as much light in as ​⁄.
Shutter speed