For phones that don't support long exposure times by default, the Google engineer who wrote the article (https://research.googleblog.com/2017/04/experimental-nighttime-photography-with.html) mentioned in a comment "when your app queries the maximum exposure time the camera API returns something like 1/5 sec, but for full-resolution still images the real maximum on both Nexus 6P and Pixel is several times longer. You need to rig the code to ignore the limit returned by the camera API and pretend the...