He says he did not photoshop...
"- Photoshopped? No, not really. I 'burned' the lighthouse lens a bit because, well, shooting into a beacon of light for two minutes tends to wash things out. I also desaturated the moon a bit in the middle, where it created a light blue artifact. Just little image fixes - otherwise this is really how the lighthouse looks (which is cool, which is why I drove down to see it)"
from the above link at flickr...
2007 Z4 3.0si