Here is a time lapse of Comet 21P as it rushes through the constellation of Auriga. It is made up of 90 images, each of 16s at ISO 6400. There is a delay between shots of 20 seconds. So the time lapse covers a period of just over an hour. The jump in the middle of the sequence is when I stopped taking pictures to refocus the telescope - sure enough focus is much better after that.