It is exciting to see Comet 2021 A1 Leonard brightening! This is a great binocular object now, and even better when it joins Venus and crescent moon in the low twilight evening sky Dec 16-20. Since the mount was set to track the comet, the stars are streaked during the 25 minutes of total exposure. This comet is really moving through the inner solar system.

Canon 5DmkIII, 10" f/5 reflector, PlaneWave L-350 tracking on the comet. Remotely-controlled from Michigan.

5x300sec exposures. Converted, calibrated, aligned, stacked in ImagesPlus (now a free software). Photoshop used to correct color balance, increase contrast, fix bad pixels, crop.