The addition of a variable aperture to the iPhone 18 Pro and Pro Max marks a significant shift from the fixed-aperture systems Apple has used for years. In practical terms, this means the camera can physically adjust its opening to suit different environments, much like a professional mirrorless camera. In bright daylight, the lens can “stop down” (shrink) to prevent overexposure and capture landscapes with more sharpness and a deeper depth of field. Conversely, in low-light settings, the aperture can open wide to pull in more light, resulting in cleaner, brighter photos with less digital noise. It’s not clear how much compromise to the image resulted from having a fixed aperture, but I guess we will find out.
The other hope I have is this means more optical zoom.