Customize the Main camera lens
On iPhone 15 Pro and iPhone 15 Pro Max, the default for the 1x Main camera lens is 24 mm. You can add 28 mm and 35 mm as secondary lenses, and change which lens is the default Main lens.
Go to Settings
> Camera > Formats > Photo Mode, then tap 24 MP.
Go to Settings
> Camera, then tap Main Camera.
Below Additional Lenses, turn on the lenses you want to add as additional Main lenses.
Below Default Lens, tap the option you want to use for the default Main lens.
Swipe up from the bottom of the screen to exit Settings.
Open Camera after setting your Main camera lens. Depending on your selection, the Main camera default lens will be either 1x (24 mm), 1.2x (28 mm), or 1.5x (35 mm). Tap the Main camera lens to switch between the additional lenses you chose.