Demystifying the iPhone 18 Pro’s Variable Aperture
Conceptually, a camera is a pretty simple device. They also learned that two other, intimately linked factors determine an exposure’s properties: the size of the aperture and how long the sensor is exposed to light. While the lens determines which part of an image is in focus, the aperture size determines how much of the image is in focus, a property known as depth of field.
- ▪Conceptually, a camera is a pretty simple device.
- ▪They also learned that two other, intimately linked factors determine an exposure’s properties: the size of the aperture and how long the sensor is exposed to light.
- ▪While the lens determines which part of an image is in focus, the aperture size determines how much of the image is in focus, a property known as depth of field.
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| Original publisher | Gizmodo |
| Canonical URL | https://gizmodo.com/demystifying-the-iphone-18-pros-variable-aperture-2000813209 |
| Publication time | Thu, 17 Sep 2026 20:10:34 +0000 |
| Retrieval time | 2026-09-17T20:13:44.397Z |
| Last seen | 2026-09-17T20:13:44.397Z |
| Headline source | Publisher (no WeSearch rewrite) |
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| Summary source text | contentText |
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| Cluster | ODFInp-H8u-W · 1 stories |
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| Publisher visit | Yes — open original |
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| Commercial reuse | May the content be reused commercially? | Not permitted |
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Opening excerpt (first ~120 words) tap to expand
Conceptually, a camera is a pretty simple device. It originates in the discovery of the camera obscura—literally “dark room”—and the fact that if you let light through a small hole, or aperture, into a darkened room, you get a projection of the world outside on the wall opposite. (Why this is the case is beyond the remit of this piece, but there’s a good explanation here.) In the 19th century, people began to experiment with capturing that image on a light-sensitive medium (which, for the sake of convenience, we’ll refer to as a “sensor” form here on in, but it can also refer to film, daguerreotypes, and a million other things.) Today’s cameras still work on the same principle, but they’re also marvels of modern technology packed full of clever engineering.
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