Nikon D750 with 500mm lens.
Edited in Bridge and Photoshop.
Comet Leonard sets behind southern Arizona's sacred Baboquivari Peak, illuminated by a 96% moon, during nautical twilight on December 16th. Leonard showed a little bit of coma and tail through the atmospheric haze, to the camera at least. I couldn't see the comet at all in real time, even searching through binoculars.