The Galaxy S9 and S9+ have rear cameras with adjustable aperture settings, allowing the phones to take photos at either f/1.5 or f/2.4. This may mean something to you, but in the event it doesn't, let me provide a brief explainer.
You might already be familiar with aperture values, or F-stops, as they relate to a camera's lens. Like the pupil of your eye, the size of a camera's aperture determines the amount of light that gets in through the lens to the image sensor. Many standalone cameras have adjustable apertures, which either expand or narrow a physical "iris" ring to let more or less light in.
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