Av is an aperture priority automatic exposure, which can adjust the aperture value. The system automatically sets the shutter speed, which is suitable for shooting still life.

Television is automatic exposure with shutter priority, and the shutter speed can be adjusted. The system automatically sets the aperture value, which is suitable for shooting moving objects.

"The larger the aperture, the more incident light." It should be that under the same shutter speed, the larger the aperture, the more near light and, of course, more exposure.