Nice image overall. I agree with Mike that the exposure time would be better dropped. I've been doing 30 and 60 second exposures with this comet, but that's CCD so quite different, still, I'd expect surely 3 min would get the comet well and you'd probably end up without nucleus trailing.
Colour looks very blue but perhaps that's correct, I wouldn't know. And slight edge distortion which is a shame, but ya get that
As I said, overall looks nice
