GoPro cameras are of course best known for video. But they also have very good capabilities as still cameras, albeit with a limited amount of control.
Here’s a collection of still images shot with the GoPro HERO4 Silver.
The HERO4 Silver has a small 1/2.3-inch sensor that produces up to 12MP images at 4000 x 3000 pixels.
The settings for each shot are included below, although you only have fairly limited control over the exposure settings. The aperture is a constant f/2.8, which the camera automatically adjusts the ISO and shutter speed. The rest is mostly automatic exposure, although you can apply exposure compensation from -2.0 stops to +2.0 stops. You can also set the minimum and maximum ISO settings to have some influence over the automatic exposure (from 100 to 800 ISO).
The newer HERO5 Black has the same kind of sensor. Despite a few tweaks in the processing engine, its photo quality is very similar.