"Aperture refers to the size of the opening that a lens allows to hit a sensor, or film back in the day. The setting is expressed in what's called f-stops, for example f/1.4 or f/2.0; smaller numbers represent bigger apertures. The larger the aperture, the greater the amount of light, which means the photographer can use a faster shutter speed for a given amount of brightness."
"Larger apertures also produce a shallower depth of field, allowing the photographer to isolate their subject by blurring the background. That's not to say that a larger aperture is always desirable. On a manually controlled camera, sometimes it's necessary to "stop down" the lens to a smaller aperture to avoid overexposing the photo in bright conditions."
The iPhone 18 Pro and 18 Pro Max will represent minor updates from their predecessors, with the primary innovation being a new camera system with variable aperture. This feature has been rumored for years but is now expected to be a key differentiator for Apple's flagship models. Variable aperture technology allows photographers to adjust the lens opening size, controlling light intake and depth of field. Larger apertures enable faster shutter speeds and shallow depth of field for subject isolation, while smaller apertures prevent overexposure in bright conditions and improve sharpness. Apple's folding phone will command significant attention in the 2026 product cycle.
Read at Fast Company
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