Dangit!
This summer we went on a hunt on the slopes of Mauna Kea which is one of the premier astronomy sites in the world. We stayed in a cabin which was a ways below the summit, but was far away from any light pollution. When I saw the stars out I decided to try to get some shots. I stumbled on to similar settings (ISO4000, 20s exp at F4) for my EM-5 and a little pocket tripod, but didn't get results anywhere near as nice. I'm sure the wind, and being unprepared for a 35 deg summer evening didn't help...but still...I'm sure it helps knowing what you're doing
