Your iPhone Camera Now Works a Bit Like Your Eye
iFixit has taken apart the main camera of the iPhone 18 Pro and iPhone 18 Pro Max to show how the new light-control system works. The report, Inside the Tiny Unfixable Eye: iPhone 18 Pro and Pro Max Teardown by Elizabeth Chamberlain, was published on September 20, 2026 iFixit.
How the lens controls light
The part is the 48MP Fusion main camera, with variable aperture and software-adjustable shutter speed. Aperture is simply the size of the opening that lets light in to the sensor.
In this phone, light is controlled by a tiny mechanical iris that opens and closes with magnets. It works a bit like the pupil in your eye. The iris has six overlapping blades, each about as thin as a human hair. Apple fit the whole stack into the same camera space used by the iPhone 17 Pro series.
The control is not smooth. It has four fixed settings, from widest to narrowest: ƒ/1.48, ƒ/1.8, ƒ/2.8, and ƒ/4.0. Apple describes the 48MP Fusion Main camera with variable aperture as the most advanced camera Apple has ever made, and notes variable aperture on iPhone 18 Pro for the first time Apple. The company states the system adjusts on its own for lighting and depth of field, the area that looks sharp, and states it offers better low-light photos and crisper details.
Repairs and photo results
iFixit called the lens "a feat of precision engineering." The firm assessed the mechanism as close to impossible to repair, requiring specialist tools, techniques and knowledge. If the iris fails, the whole camera unit must be replaced. That unit itself is easy to reach. For reference, the iPhone 17 Pro camera assembly costs $249 The Verge.
The teardown also flagged a separate display concern. The screen's plastic frame tore apart on three of the four iPhone 18 Pro phones iFixit opened. The finding forms part of a wider exploration of a potential issue involving display repairs.
The Verge's iPhone 18 Pro review found the new lens made a generally marginal improvement to overall photography. The Pro models also carry a 48MP Fusion Ultra Wide camera that captures wider views and enables macro photography.
The broader context here is a common trade in small devices. Tiny magnetic parts add real light control without making the camera bigger, which leaves room for the circuit board and battery. It also means a broken part leads to a full swap. In my view, that is a practical result, not a design fault. Small camera shutters were never easy to fix by hand, and adding physical light control to smart software gives engineers a new tool for sharpness and low-light shots, even if the first step is small.
