The aperture priority on the turntable of digital camera is marked as

The aperture priority mark on the turntable of digital camera is Av.

This is a shooting mode that photographers often use in their daily shooting. Aperture priority means that the automatic metering system of the machine calculates the exposure value, and then automatically decides how many shutters to use 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.

Aperture priority

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 according to the light conditions at that time. Digital cameras with exposure mode dial usually engrave the letter "A" on the dial to indicate the aperture priority 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.