What is shutter priority automatic exposure?

It belongs to active exposure mode, and it is a practical shooting technology for shooting moving objects or shooting occasions that need long exposure.

The purpose of automatic exposure is to realize the appreciation brightness level or the so-called target brightness level under different lighting conditions and scenes, so that the captured video or image is neither too dark nor too bright.

To achieve this goal, it is necessary to adjust the lens aperture, sensor exposure time, sensor analog gain and sensor /ISP digital gain. This process is called automatic exposure.

Related concepts:

In the programmed automatic exposure mode, the camera can automatically set the shutter speed and aperture value according to the exposure value of the shot picture measured by the metering system and the shutter and aperture exposure combination set by the manufacturer during production. As far as camera operability is concerned, this method is equivalent to the so-called "fool camera".

The operator does not need to adjust the shutter speed and aperture value at all. All he has to do is focus well and press the shutter release button. The common electronic program shutter of "fool" camera belongs to this exposure mode. In fact, only the program automatic exposure mode is the real "automatic" exposure mode.

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