Here is a quick and dirty time-lapse movie of Comet PanSTARRS over the course of three evenings (March 12, 14, and 19). Details varied on exposures and lens from 1-2 seconds, 210-400mm, ISOs from 400-3200. If you look closely, you’ll notice that the angle of the comet tail changes over the course of these short clips.
The entire thing is about 40 seconds long. The first two sequences were from March 12. The last sequence from March 19. The rest from March 14.