That really is a bright comet!
This is from Sydney under 95% full moon with a Canon 5DmkIII plus 70-200 F2.8 with a normal tripod.
About 80 x 2.5 second exposures at ISO12800, with lots of darks. Processed in PixInsight.
Bigger one here:
https://hughsblog.files.wordpress.co...2014q2_web.jpg