A 15.8 minute exposure. Canon 1DMKII. ISO 50, 70-200L2.8 IS at 200MM F10. No filter.
A fairly long burn with Noise Reduction on, so it took over 30 minutes to do. I still had a few black pixels to clone out, but the result was acceptable. A bit of Noise Ninja as well.
Cropped from 8 MP rectangle. I found the shot called for the pano look.
It was foggy and I could only see the beacon and a few light glows on the left. This was over a mile off shore.
I love burning in time exposures as they create a different world.