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Comet Lovejoy C/2014 Q2
Equipment: Canon 7D2, ISO1600, Sigma 150mm f/2.8 macro at f/2.8, Astronomik CLS CCD filter, 161 x 30s exposures. Took more but rejected a load due to cloud. Tracking background stars unguided with lousy polar alignment.
Processing: Starting with PixInsight, flats, star align, comet align, stack, stretch, DBE, curves, photoshop.
Above is only a comet aligned stack. I've tried to optimise viewing for the tail in this image.