iFixit Teardown Reveals Intricate but Hard-to-Repair Variable Aperture in iPhone 18 Pro Cameras
Apple’s iPhone 18 Pro and 18 Pro Max introduce a sophisticated variable aperture system in their 48MP Fusion Main cameras, as revealed by iFixit’s detailed teardown published on 20 September 2026. This mechanical iris consists of six overlapping, leaf-like blades, each approximately as thin as a human hair, that open and close magnetically to control the amount of light reaching the sensor.
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The aperture mechanism fits within roughly the same main-camera footprint as the previous iPhone 17 Pro generation, showcasing Apple’s precision engineering at a miniature scale. iFixit demonstrated the blades’ movement by passing a magnet near the camera module, highlighting the magnetic actuation that adjusts aperture settings among four built-in options: f/1.48, f/1.8, f/2.8, and f/4.0.
While Apple promotes this feature as enhancing low-light photography and video quality, independent analysis from iFixit and other sources suggests the practical improvement for typical users is limited. The small sensor size and short lens focal length restrict the depth-of-field effects that variable aperture can produce compared to larger cameras.
Repairability presents a notable challenge. During disassembly, iFixit found that the tiny aperture blades can easily come loose, and the tight tolerances combined with adhesive use make component-level repair effectively impossible. Should the aperture mechanism fail or become stuck, replacing the entire main-camera assembly is likely required. Fortunately, this assembly is modular and reasonably accessible once the display is removed, though Apple has not yet published official replacement part pricing. For context, the previous generation’s camera assembly cost $249, and the added complexity of the variable aperture may increase this figure.
Another concern arose from iFixit’s teardown: the plastic frame around the display was damaged in three of the four iPhone 18 Pro units opened. This damage could affect the display’s fit and water resistance after repair. However, it remains unclear whether this is a widespread issue related to design or manufacturing, or an anomaly linked to the teardown process itself.
Overall, iFixit provisionally rated the repairability of the iPhone 18 Pro and Pro Max at 7 out of 10, reflecting a balance between modular components like the camera and battery tray, and the difficulties posed by the delicate aperture mechanism and display frame concerns. Apple’s official product information emphasises the camera’s variable aperture as a key upgrade, aiming to improve low-light performance and detail, though the real-world benefits may be subtle for most users.