Star trails at Saint-Michel l'observatoire (2)

This is a different approach to creating star trails than a single long exposure (see flic.kr/p/2nfPqSS). Here, 15 images (8 seconds, f/5.0, ISO 3200), were taken at regular intervals, and stacked together to produce a single image where the "trails" are composed of 15 discrete points of light.

Done