The Halide camera app now offers full control of the iPhone 18 Pro’s aperture

You can select any f-stop setting with the latest update to Halide Mark III.

A new update to Lux Optics’ anti-algorithm Halide camera app for the iPhone and iPad adds two new photography looks and support for the variable aperture on the new iPhone 18 Pro’s main camera . Halide isn’t the first alternative to the native iOS camera app to add support for the new feature, but it offers more finite control over aperture settings than other third-party apps.

The iOS camera app limits aperture adjustments to just four presets, but both the BlackMagic Camera and Moment Pro Camera II apps expand that to 10 presets in 1/3 stop increments, similar to what most digital cameras offer. Halide Mark III goes even further by letting you select any f-stop setting from f/1.48 down to f/4.0. Although it’s hard to imagine you’ll see any noticeable difference between f/4.0 and f/3.99, the option is available. The Halide developers are also considering adding f-stop presets in future updates based on user feedback.

Halide Mark III launched earlier this year with added features including a new film simulation engine and multiple looks that can be applied to photos. Today’s update adds a new Dawn look to the collection that applies “filmic warmth in the mid-tones and highlights with gentle, rich shadows” and Quicksilver, which “pairs high contrast with muted color, inspired by silver-retention processes.”