Apple has published one substantial low-light claim for iPhone 18 Pro, and it belongs to a single focal length. The variable aperture on the 24 mm Main camera opens to f/1.48, which Apple ties to around 50 percent better low-light performance and a faster Night mode.
For the other four focal lengths, Apple has published the aperture and little else. Night mode is listed as a feature of the phone rather than described camera by camera, which leaves a real gap between what buyers assume and what Apple has actually stated.
| Focal length | Aperture at night | What Apple published about night behaviour |
|---|---|---|
| 13 mm (0.5x) | f/2.2 fixed | Night mode listed for the phone, no per-camera detail |
| 24 mm (1x) | Opens to f/1.48 | Around 50 percent better low-light performance, faster Night mode |
| 48 mm (2x) | Follows the Main camera | No separate figures |
| 100 mm (4x) | f/2.8 fixed | No separate figures |
| 200 mm (8x) | f/2.8 fixed, 12MP crop | No separate figures |
What Apple published about Night mode
Apple’s specs list Night mode among the photographic features of iPhone 18 Pro, alongside next-generation portraits with Focus and Depth Control, Portrait Lighting with six effects, ProRAW and 24MP and 48MP super-high-resolution capture. The press release adds that Night mode is faster than before.
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Apple’s current support guide, written for the previous release, describes the behaviour: Night mode turns on automatically in low light, it can be switched off and on with a button, exposure options can be chosen from the controls, and crosshairs appear when the phone detects movement so you can align them and hold still. Those steps may differ once iOS 27 ships on Monday, September 14.
Why 24 mm is the focal length that changed
The aperture is the reason. Only the Main camera can open to f/1.48, and Apple’s newsroom wording says the camera will select that stop automatically in low light. A wider aperture passes more light for the same exposure time, which is the mechanism behind both the low-light claim and a shorter Night mode capture.
That makes 1x the default choice after dark on this phone, and it makes the 2x crop the only other frame that inherits the benefit, since the crop comes off the same lens. Our explainer on the variable aperture covers how the six-blade mechanism works.
13 mm, 100 mm and 200 mm have fixed apertures
The Ultra Wide sits at f/2.2 and the Telephoto at f/2.8, and neither figure moves. Apple has published no low-light claim, no exposure range and no Night mode timing for either camera, and nothing at all specific to the 200 mm crop.
What the phone does have on the long end is stabilisation: 3D sensor-shift optical image stabilisation on the 100 mm Telephoto, and optical image stabilisation on the Main. Apple has not published how much exposure time that stabilisation buys back, so no figure should be attached to it.
| Lens | Aperture | Stabilisation Apple lists | Resolution |
|---|---|---|---|
| 13 mm Fusion Ultra Wide | f/2.2 | Not published | 48MP |
| 24 mm Fusion Main | f/1.48 to f/4.0 | Optical image stabilisation | 48MP |
| 100 mm Fusion Telephoto | f/2.8 | 3D sensor-shift optical image stabilisation | 48MP |
Reading the five focal lengths at night
Apple has not published a night shooting guide, so the following is our reading of the published optics rather than an Apple claim. At 1x you have the widest aperture on the phone and the automatic switch to f/1.48, which makes it the frame to default to indoors and after dark.
- 13 mm: fixed f/2.2 and the widest field of view, so brace it and expect Night mode to do the work.
- 24 mm: opens to f/1.48 automatically, the strongest low-light position on the phone.
- 48 mm: inherits the Main camera’s stop, at 12MP rather than 48MP.
- 100 mm: fixed f/2.8 with 3D sensor-shift stabilisation, the point where a wall or a rail helps.
- 200 mm: fixed f/2.8 and a 12MP crop, the hardest frame to hold at night.
There is also a video note worth carrying over: Apple lists 4K Dolby Vision HDR time-lapse, and Night mode time-lapse has been part of the Camera app for several generations. Apple has not published which focal lengths support it on iPhone 18 Pro.
What Apple has not said
Apple has not published Night mode exposure ranges, maximum capture times, or a list of which focal lengths and modes support Night mode on iPhone 18 Pro. It has not published a night comparison against last year’s phone beyond the faster Night mode wording, and it has published no sample images we can judge results from.
There is also no iOS 27 support article yet for the new Camera app, so the manual aperture and shutter speed controls have no published step list. The confirmed hardware sits in our iPhone 18 Pro launch coverage, the year-on-year picture in our comparison with iPhone 17 Pro, and the processing behind Night mode on the chip in our A20 Pro breakdown.
iOS 27 arrives Monday, September 14. Pre-orders open Saturday, September 12 at 5 a.m. PT and iPhone 18 Pro reaches stores Friday, September 18, which is the first date anyone can test any of this.
