The S9 will allegedly use f/1.5 in the dark, and f/2.4 when it gets brighter.
The main new addition in the spec list is a 12MP rear camera that lists two camera apertures: f/1.5 and f/2.4. This sounds like the Galaxy S9 will ship with the same variable aperture camera that Samsung has already shipped in the W2018 flip phone. In non-ideal lighting conditions, the W2018 uses the f/1.5 aperture to collect as much light as possible, but in brighter lighting, it switches to f/2.4 for a wider depth of field. Samsung’s $1,500 ($1,500? $1,500!) flip phone doesn’t have a wide distribution, but the gif of this camera working is pretty incredible—just like a DSLR, a set of miniaturized aperture blades open and close with the changing light levels.
Another feature revealed by the spec list is a set of stereo speakers. Again, with the understanding that the Galaxy S9 will look a lot like the Galaxy S8, this most likely means that the earpiece now doubles as a second speaker and will play along with the usual bottom-firing speaker.
The Galaxy S9 will launch at Mobile World Congress in February.