Comet Lovejoy on January 6, 2014, shot though a telescope for a close-up view with a field of rouhgly 4 x 3 degrees. The green coma and blue ion tail are prominent. The tail was just barely visible through binoculars. I shot these frames betwen end of twilight at 6:30 pm and moonrise at 7;15 pm. The comet was a day before its closest approach to Earth.
Technical — I shot the images through the TMB 92mm refractor at f/4.4 for a roughly 400mm focal length, with the Canon 6D at ISO 1600 for a stack of 4 x 2 minute exposures, blended with Mean combine mode for noise reduction. The mount was guided on the comet head using the Orion Starshoot autoguider aand Borg 50mm guidescope controlled by PHD Guiding. Thus the slightly trailed stars.
The Amazing Sky 