One of the questionable limitations of the iPhone 18 Pro’s new main camera with a variable aperture is that you’re limited to just four settings in the native iOS’ camera app in manual mode: f/1.48, f/1.8, f/2.8, and f/4. Those same limitations are also in place when the app is adjusting the iris itself in Auto aperture mode, but it turns out that’s not a strict limitation of the iPhone’s camera hardware. Apple’s SDK allows third-party camera apps to implement more granular control of the aperture.
Yesterday, Moment followed suit with an announcement on X that its $12.99 Moment Pro Camera II app has also been updated to support the iPhone 18 Pro’s variable aperture. You can adjust the aperture from f/1.48 to f/4.0 in 1/3 stop increments giving you 10 presets like Blackmagic’s app, which is the same approach as most digital cameras take. Given the small sensor size of the iPhone 18 Pro you may be hard-pressed to see a difference in background blur and focus depth when comparing photos with f-stops different by just 1/3 of a stop, but more control is never a bad thing.
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