Aperture (n.) The opening in a lens that controls the amount of light reaching the camera sensor, expressed as an f-number (e.g., f/2.8). In mobile photography, many phones have fixed apertures, while some high-end models offer variable apertures. A wider aperture (smaller f-number) allows more light and creates a shallower depth of field, useful for portrait mode effects. Aperture also affects the overall sharpness and low-light performance of mobile photos.
Aperture
