The full-res mode for the main camera is found under the 'Camera resolution' menu item in the app settings, where you also get the same aspect options as in the slide-out pane in the viewfinder - perhaps having the 50MP mode there as well is logical? In basic Photo mode, that's where you'll find the flash modes, aspect ratio and HDR settings, while in Video you have the resolution, frame rate and stabilization modes. The new feature is the contextual options pane you can pull out by tapping on the little arrow at the far end of the viewfinder or by swiping down in the viewfinder itself. The camera app has been redesigned slightly, though basic operation remains largely the same as before and the same as on any other camera app. A 12MP Sony IMX663 1/2.93" sensor with 1.22µm pixels and dual pixel PDAF sits behind a 28mm f/2.45 lens. Over on the front, it's another tried-and-tested setup lifted off the Zenfone 8. It's got dual-pixel PDAF and it can also do close-up photography from as close as 4cm.
That means a 12MP Sony IMX363 1/2.55" sensor with 1.4µm pixels and a 14mm f/2.2 lens. The Zenfone 9's ultrawide camera is the same as the 8's.
It's worth pointing out that, going by the specs, the setup looks just like the one found on the vivo X70 Pro though vivo lists the lens aperture at f/1.8. What Asus's press materials specify as 6-axis stabilization is capable of providing compensation for up to 3 degrees of shake, compared to the 1 degree that conventional OIS can do. This whole ensemble is mounted on a gimbal too. The lens in front of that sensor has a 24mm equivalent focal length and an f/1.9 aperture. It uses the 2x2 OCL method for its phase detection autofocusing, which makes it sensitive to changes in detail in both principal directions as opposed to the usual left/right only capability of generic dual pixel autofocusing - so you should be able to get faster and more accurate autofocus in more shooting conditions. The new primary camera features a 1/1.56" Sony IMX 766 sensor - a Quad Bayer design with 1.0µm pixels, 50 million of them. The Zenfone 9 improves on the camera system of the previous model with a new primary unit, while keeping the ultrawide and the selfie cameras, both of which the Zenfone 8 had already dialed in pretty nicely. No tele, but a gimbal-mounted main camera and AF all around