This was shoot with a Canon 7D to CR2 RAW files. Two exposures where used, bracketed at 1/50th and 1/200th taken every 4 seconds. The camera is mounted on a telescope head (a.k.a MiLapse mount) to give some extra motion to the image.
The CR2 files were batch converted into two CineForm RAW AVIs at 5184x3456, which where then loaded into After Effects to blend the two exposures. Color correction was done in First Light.
This was my first HDR time lapse, and I learned not to use such a fast shutter speed as the camera's exposure between frames in a little bit random. Next time I'll add ND filters so exposures can be more like 1/15 and 1/4th of a second (or slower.)