Comet SWAN still brighter than 6 mag, probably a naked-eye object under dark skies (not the case at POR: SWAN almost behind a street lamp!).
Sky, however, was very transparent at dusk. SWAN could be seen with its tail using C11 + Nagler 31 + SWAN band, and even using 25x70 binos.
Here some preliminary images with modified 5D: left: 500/5.6, 30s at ISO 800 / right: C11, 15s at ISO 1600. Single exposures (more to come asap).