9s f/2.8 at 17mm iso400
Total star trail time ~2,5 hrs, total exposure half of that
469 images composited with Startrails.

The camera was taking pictures for about 5 hours, but because of incoming clouds I could only use half of those for the star trail image. I also used the pictures for a time lapse video. The star trail shot is at the end of this video: https://vimeo.com/27965801.