German Berka camera 20-z35s digital camera aperture priority?

Aperture priority means that the exposure value is calculated by the automatic metering system of the machine, and then the number of shutters is automatically determined according to the aperture size you choose. Manually set the aperture value, and automatically adjust the shutter speed according to the metering result. Generally used for shooting still life and controlling depth of field.

In an automatic exposure camera, the size of the aperture is first determined. Shutter speed is controlled by electronic shutter for proper exposure. After we decide the aperture f value ourselves, the camera metering system will automatically choose the appropriate shutter speed (which can be an accurate stepless shutter speed) according to the light conditions at that time. Digital cameras with exposure mode dial usually carve an "A" letter on the dial to represent the aperture prerequisite mode. Aperture prerequisite mode is suitable for photography that emphasizes the depth of field effect.

Aperture priority is an exposure control mode. The photographer manually sets the required aperture size, and then the camera automatically selects the shutter speed suitable for exposure according to the brightness of the shooting scene light, CCD sensitivity, manually set aperture and other information, thus achieving accurate exposure.

Depth of field refers to the range in which the focused subject can clearly image before and after shooting the scene. Large depth of field means that the subject and the scenery before and after are very clear, while small depth of field means that only the subject is clear and the background is blurred. Depth of field is related to aperture size, lens focal length and shooting distance. The larger the aperture, the smaller the depth of field, the smaller the aperture and the greater the depth of field; The longer the focal length, the smaller the depth of field, the shorter the focal length and the greater the depth of field; The closer the distance, the smaller the depth of field, and the farther the distance, the greater the depth of field.