This is 25x5s, captured with my tripod mounted Nikon D90 DSLR and Nikkor 18mm-200mm zoom lens set at approx 65mm. I shot a single flat using my laptop screen to try to reduce vignetting, which worked reasonably well compared with no flats. All processing was using ImagesPlus6.5. The image is very bright overall to better show the anti tail. There is a very strong gradient due to the twilight sky as the comet was setting, plus some clouds were passing through, hence the smudge at the bottom, but I decided to leave them in the stack for better SNR on the comet.