Apple's quiet headline act

The foldable iPhone Duo took the spotlight at the iPhone 18 launch, but Apple also put a variable aperture lens on the main camera of the 18 Pro and Pro Max.

“the most advanced camera Apple has ever made”

Six blades, one rotor

A new 48MP sensor sits behind a diaphragm of six laser-cut blades on a rotor mechanism, gliding between f/4 and a bright f/1.48.

Auto or pick it yourself

The phone chooses an aperture based on whether it needs a faster shutter or more depth of field. In the Camera app you can override it with four settings.

Apple is late, not first

Huawei shipped an f/1.4-f/4 lens in the 2022 Mate 50 Pro. Xiaomi followed in the 14 Pro a year later. The Galaxy S9 had dual apertures back in 2018.

So why isn't it standard

The tech has been viable for years and still hasn't spread across high-end phones. That gap is the real question, and there's a good reason behind it.

Sensor size sets the rules

Bigger sensors mean shallower focus at any given aperture. A full-frame camera has to stop way down to hold a near subject and a far background together.

Phone sensors are tiny

The iPhone 18 Pro's sensor measures 1/1.28 inch. Even wide open at f/1.48, almost everything in the frame lands in focus already.

A cheap phone proves it

A Galaxy A53 shot at f/2.2 kept a subject under a foot away sharp while distant background stayed nearly in focus. No stopping down required.

Just open it all the way

If deep focus is free, fix the aperture as wide as possible. More light means faster shutter speeds and lower ISO, which means sharper, cleaner shots.

Different beats better

The reviewer has tested phones for years and almost never wanted to stop down. With most camera upgrades now being AI, a moving diaphragm is at least real hardware.

“I've almost never wished I had the ability to stop down”