The primary shooter on the Nexus 9 is 8MP, taking images at a native resolution of 3280*2460. There is a 1.6MP secondary camera on the front. As it is a Google device, Google’s own camera app is used.
Images have a reasonably good depth of colour and detail, with acceptable lighting too. Often the camera would fail to accurately make out the sky in outdoor shots, so it seems exposure in sunlight is an issue.