Experiments with Star Trail Photography.

As it was a fine clear evening I decided to have a go at taking a star trail picture tonight.  After some trial exposures I settled on 800 ISO with 30 secs @ f4 which gave a good result for a single image.  I then set the camera to continuous and recorded 99 images over an hour.  These were  stacked  together using Star Trails software.  As I live in a town I set the white balance to the lowest colour temperature possible to remove the orange glow from the street lights. I was quite pleased with the result for a first attempt.