I was inspired by
RB's contrasty comet photos, so I did some black & white repros - larger versions
HERE and
HERE.
I like the B&W version of #1 (landscape) since the conversion puts the visual emphasis on the comet, Milky Way, and Magellanic Clouds rather than the twilight/airglow/stars.
#2 in this repro is actually a stack of 17 subs, but the trailing due to the lack of tracking combined with the wide angle distortions doesn't work for me