50 Minute Exposure with a D200???
Then I came across Flickr user happylaura's image below. As any night photographer will immediately notice from the length of the startrails, this exposure was significantly longer than twenty minutes. Could it have been created by stacking multiple shorter exposures?
Happylaura (her real name is Laura Elskan) took the above image with the relatively new Nikon D200. It was a single exposure, using only in-camera noise reduction. In other words, no stacking of multiple images, and no post-processing noise reduction such as NoiseNinja. The temperature? It was a brisk 30-deg F. Not unreasonably cold for any serious night photograper.
She also told me that she took another image at 109 minutes! It looks like Canon now has some serious competition in the NPy world, now.
If any other night photographers have any experience with long exposures with the D200, please post them to the comment section.