I would like to take some long exposure photos using my Android phone (Moto DROID v1 running Android 2.2.2) of the night sky. I experimented with the settings for the default camera app, and I found that I can set the focus to infinity, but the exposure time has only three settings: 0, +1, and +2. If I set the exposure to +2, I can get a recognizable photo of a full moon, but I am unable to capture a field of stars.
Is there any way to extend the exposure time beyond +2?