11 two-minute images were stacked using the startrails.exe program.
I actually had footage for over one hour of trails, but the twelfth shot was ruined by a sudden influx of light from the house in the corner. It is not possible to eliminate just one shot from the series since that would leave a gap in the trails. So I had to cut it short to 11 shots, which actually turned out quite nicely.
Taken in Saas Fee, Switzerland.
This photo is under copyright © Thomas Sittler