What does f mean for Apple Camera?

Aperture value, also known as aperture size. The "f" in Apple cameras usually refers to the aperture value, also known as aperture size. Aperture is an important parameter of a camera lens, used to control the amount of light entering the camera. The smaller the aperture value, the larger the aperture through which light passes. The more light enters the camera, the brighter the photo. The larger the aperture value, the smaller the aperture through which light passes. The less light enters the camera, the brighter the photo. dark. The aperture value also affects the depth of field of the photo. A smaller aperture value can produce a larger depth of field, so that the front and rear scenes can be clearly displayed. A larger aperture value can produce a smaller depth of field, making the subject more prominent. Therefore, the choice of aperture value has an important impact on the brightness and depth of field of the photo.