This comet was already past its best and fading. It was in Cygnus, with the stars and emission nebulae of the Milky Way as a backdrop.
Modified Canon EOS 600D,Revelation 300mm f/4 Newtonian 26 x 2-min auto-guided exposures at ISO 3200, stacked on the comet in Deep Sky Stacker software (hence the trailed stars).
Post-processed to reduce noise and increase contrast.
full exif
