Heres another image of comet C/2014 Q2 Lovejoy: Ive got more of them on my processing backlog but I picked this one because its the one with the longest sub-exposures. It was taken from my backyard, in a heavily light-polluted area close to Varese, Italy.
Longer sub-exposures tend to show the comets tail better, but at the expense of a sky background thats way more difficult to tame because of light pollution. And indeed, it turned out to be a pain to process, but I think the result is rather pleasing. I did my best trying to bring out the faint wisps and jets in the comets tail. Hope you like it!
Exposure info: 78 x 90 s taken on January 11, 2015 with a Canon 6D DSLR through a Pentax 105 SDHF refractor; processed in Maxim DL, PixInsight and Photoshop. Click on the picture for a larger version; more details available in the caption.