What is exposure?

Exposure refers to the process of controlling the shutter time, aperture and sensitivity of the camera in photography, exposing the photosensitive material of the camera and recording the picture to be displayed. Exposure is one of the basic elements of photography, which can affect the brightness, contrast, saturation and detail of photos. Mastering exposure skills can help photographers better control the effect of photos, so as to achieve the ideal artistic expression effect. ?

Exposure is mainly determined by three parameters: shutter time, aperture and sensitivity. Shutter time is the length of time that the camera shutter is opened. Aperture controls the amount of light entering the camera by adjusting the aperture size of the lens. Sensitivity is a measure of the sensitivity of camera photoreceptor materials to light. The combination of these three parameters can produce different exposure effects. For example, a longer shutter time and a smaller aperture can be used to shoot moving objects, which can produce dynamic effects, while a shorter shutter time and a larger aperture can be used to shoot still objects, which can produce clearer pictures. ?

In digital cameras, exposure can be achieved by directly adjusting the camera's exposure compensation, ISO sensitivity, white balance and other parameters. In addition, more complex exposure effects can be achieved through HDR technology, multiple exposure and other technologies.