Thanks +Stefan Haworth, +Jo Garrett, +lindsey white, and +Drew Hopper! This was over 100 images, each captured under a 60% full moon for 30 seconds at f/2.8, ISO 1600 (if I remember correctly). Then the images were combined using the StarStaX software to reveal the earth's movement under the stars during that time. It turned out well enough that Outdoor Photographer Magazine asked me for a high res copy of this image for consideration as a cover photo!
having dabbled in star-trails really helps me appreciate what went into making this image! It is a bit hard to tell from the resolution here, but how did you get the depth of field at 2.8 (of course you had the wide angle, but that wouldn't seem to compensate fully...)
+James Davis DOF is surprisingly deep at 16mm, even at f/2.8. +Denis Grenier The water is not a good reflecting surface at such an extreme angle, and so well lit by the full moon, plus the reflection loses 3-4 stops of light. You can see a few of the absolute brightest stars.
+Chloe Celestia Fair question. It's real. I did use a sequence of 30 second exposures to make the star trails, since that enabled me to leave out the glare and other light pollution from passing cars on the far end of the field, behind the pond. So in a sense it's edited, but in a way which leaves it more natural, more real than a single exposure making the place look no more appealing than a city street. Since the total time covered was about 45 minutes, to unnaturally preserve the effects of a few random and momentary passing cars would be much more of an unreal effect than leaving them out, since they were not there for the vast majority of the time covered by the shot. For that reason, far more control over the result, I rarely use a single long exposure for star trails (and frankly I wonder why anyone using a digital camera would).