The colors of the stars are more pronounced in this image as a result of thin haze acting as a diffusion filter. I like the effect.
Details
2013-10-09 at 5:30 in the morning.
Coditions - clear with a light haze, 8 deg C and no wind.
Canon T3i (modified) with a 50mm lens on an IOptron sky tracker mount.
Used 3 of 5 exposures - 8 min each at ISO 100 and f/4 with 4 darks to match.
Processing in Photoshop.