iPhone 18 Pro Review: All About that Chip
In a Nutshell
The iPhone 18 Pro is essentially an "S" update with the standout feature being its A20 Pro chip on a 2-nanometer process that delivers both major performance gains and efficiency improvements through a new vapor chamber cooling system. The most notable camera addition is a variable aperture lens that can adjust from f/1.48 to f/4, giving users creative control over depth of field and light intake. Battery life reaches new highs through the chip's efficiency rather than capacity increases, while charging speeds improve to 45W, with the phone otherwise maintaining the same 48-megapixel triple-camera system and design language from the previous generation.
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The iPhone 18 Pro is essentially an iPhone 17 Pro with a chip update, a camera upgrade, and better battery life, plus new colors. While this represents what would traditionally be called an S update, the device is actually underrated despite the perception of minimal changes.
The Pro iPhone has gone under the radar for two straight years while Apple tested riskier ideas on other models. Last year the iPhone Air stole attention, and this year the first folding iPhone called the Duo is taking focus. The flagship Pro iPhone hasn't had a groundbreaking feature in over a decade, as those appear in other models, but it remains simply the best iPhone they make with quiet improvements over time.
The camera system features the same three 48-megapixel cameras as the 17 Pro: a 48-megapixel primary camera, 48-megapixel ultrawide, and 48-megapixel 4x telephoto. The main camera now includes a variable aperture lens, which is a significant departure from the fixed aperture lenses that have been standard in iPhones and most smartphones except Samsung models.
Fixed aperture lenses display a single f-stop like f/2.2, f/2.0, or f/1.8. The variable aperture on the 18 Pro opens to a maximum of f/1.48 and can stop down to f/1.8, f/2.8, or f/4. Third-party apps can access infinite stages for smooth transitions. The lower the f-number, the larger the aperture and more light reaches the sensor, though stopping down increases sharpness and depth of field.
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