The iPhone Duo’s second rear lens is a 48MP Ultra Wide at 13 mm and f/2.2 with a 120-degree field of view, and Apple says it matches the iPhone 18 Pro’s Ultra Wide. Apple’s specs also credit it with 48MP macro, which makes it the only camera on the phone that shoots both the widest and the closest.
It is the one camera where the iPhone Duo gives up nothing to the Pro line. The main camera is fixed at f/1.6 rather than variable, and there is no telephoto lens, but the Ultra Wide is the same published specification on a $1,999 foldable as it is on a $1,199 iPhone 18 Pro.
Key facts: the iPhone Duo Ultra Wide
| Spec | What Apple lists |
|---|---|
| Resolution | 48MP Ultra Wide, half of the 48MP Dual Fusion system |
| Focal length | 13 mm |
| Aperture | f/2.2 |
| Field of view | 120 degrees |
| Macro | 48MP macro |
| Zoom step | 0.5x, the bottom of a 4x optical range |
| Stabilization | Not listed. Sensor-shift OIS is listed on the main camera only |
| Apple’s comparison | Matches the iPhone 18 Pro’s Ultra Wide |
The one camera the Duo shares with the iPhone 18 Pro
Apple’s press release says the Duo’s Ultra Wide matches the iPhone 18 Pro’s, and the two spec sheets agree line for line: 48MP, 13 mm, f/2.2, 120 degrees.
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That parity does not extend to the rest of the system. The Pro’s main camera moves between f/1.48, f/1.8, f/2.8 and f/4.0, and it adds a 48MP tetraprism telephoto at 100 mm, which the Duo does not have in any form.
| Rear camera | iPhone Duo | iPhone 18 Pro |
|---|---|---|
| Ultra Wide | 48MP, 13 mm, f/2.2, 120 degrees | 48MP, 13 mm, f/2.2, 120 degrees |
| Main | 48MP, 26 mm, f/1.6 fixed | 48MP, 24 mm, four aperture stops |
| Telephoto lens | None | 48MP, 100 mm, f/2.8, tetraprism |
| Rear lenses in total | Two | Three |
| Optical steps | 0.5x, 1x, 2x | 0.5x, 1x, 2x, 4x, 8x |
The Duo has four cameras in total and only two of them face outward, so every framing choice from 0.5x to 10x runs through the Ultra Wide or the main sensor. Our Duo camera explainer sets out the whole arrangement.
48MP macro and what it replaces
Apple lists 48MP macro against the Ultra Wide rather than the main camera, which is the usual arrangement on iPhone: the widest lens focuses closest, so it takes the close-up work.
On a phone with no telephoto lens, that gives the Ultra Wide both ends of the Duo’s useful range. It is the 0.5x landscape camera and the close-up camera, and the main sensor covers everything in between.
Apple publishes no minimum focus distance for macro on the Duo, and it does not say whether macro switching is automatic, as it has been on previous iPhones.
The 120-degree figure is the other number worth reading carefully. It describes how much of a scene the lens takes in, not a measure of quality, and it is the same figure Apple prints for the Ultra Wide on the iPhone 18 Pro and iPhone 18 Pro Max.
What the Ultra Wide inherits from the rest of the system
Apple lists Deep Fusion, Smart HDR 5, Night mode, Portrait Lighting with six effects, Photographic Styles 3 and Smart Focus tracking for the Duo’s camera system, without breaking down which lens each feature applies to.
Video figures are also published for the system rather than per lens: 4K Dolby Vision at up to 120 fps, Cinematic mode up to 4K at 60 fps, Action mode up to 2.8K at 60 fps, and Dual Capture at 4K 30. The lens cover is sapphire crystal and the flash is True Tone.
Both Duo displays can act as the viewfinder, and there is a Camera Control button with a Siri Camera mode. The Duo against the iPhone 18 Pro Max comparison covers the rest of the hardware trade.
A wide lens also suits the shape of this particular phone. Apple describes the open Duo as a wide, passport-like format, and the 7.6-inch inner display is 50 percent larger than the iPhone 18 Pro Max’s screen, so a 0.5x frame gets an unusual amount of room in the viewfinder.
Apple has not published how the camera interface behaves differently on each display, beyond saying that iOS 27 adapts layouts to whether the phone is open, closed or posed.
What Apple has not said
Apple does not list stabilization for the Duo’s Ultra Wide, publishes no sensor or pixel size for it, and gives no macro focus distance. It also does not say whether the 48MP Ultra Wide can record video at its full resolution or which frame rates it supports on its own.
No one outside Apple has used the camera, so nothing about how it performs can be stated. iPhone Duo pre-orders open Friday, October 16 at 5 a.m. PT, with shipping from Friday, October 23.
