Wizard Nebula, Sh2-142 in Cepheus
My first session with the 12" Newtonian since May, and unfortunately not very successful due to the aberrations (coma and tllt) that distort the stars (I've cropped the worst of it out). It seems to be worst when I image objects high in the sky, while those closer to the horizon have better-shaped stars.
28 x 2-minute manually-guided exposures, ISO 3200, f/4, taken on 17 and 20 September. Modified EOS 600D & Revelation 12" Newtonian reflector telescope.
Frames registered and stacked in DeepSkyStacker software; curves adjusted in Canon Photo Professional; noise reduction in CyberLink PhotoDirector.
Update: I've added 12 more sub-exposures, taken on 20 Sept, re-stacked and reprocessed for a less noisy result than the original.
Wizard Nebula, Sh2-142 in Cepheus
My first session with the 12" Newtonian since May, and unfortunately not very successful due to the aberrations (coma and tllt) that distort the stars (I've cropped the worst of it out). It seems to be worst when I image objects high in the sky, while those closer to the horizon have better-shaped stars.
28 x 2-minute manually-guided exposures, ISO 3200, f/4, taken on 17 and 20 September. Modified EOS 600D & Revelation 12" Newtonian reflector telescope.
Frames registered and stacked in DeepSkyStacker software; curves adjusted in Canon Photo Professional; noise reduction in CyberLink PhotoDirector.
Update: I've added 12 more sub-exposures, taken on 20 Sept, re-stacked and reprocessed for a less noisy result than the original.