Capturing M81 and M82 with an 80mm Telescope
This post was originally published in March 2012, when I was still learning how to use my astrophotography equipment. I was starting to see some promising results using the Explore Scientific ED80 refractor and my Celestron CG-5 GoTo mount.
More importantly, the lessons I learned from Jerry Lodriguss were beginning to sink in and my image processing skills were improving. My workflow involving DeepSkyStacker and Adobe Photoshop has not changed, as I still use those 2 pieces of software to process my images today.
We had a few clear nights during this past week, and I was able to set-up and image for a few hours. The target I chose to shoot is a pair of galaxies in Ursa Major. M81, Bode’s Galaxy and M82, the Cigar Galaxy. They are two distinctly different galaxy types within a close field of view through a telescope.
These galaxies are an excellent choice for visual observations from a dark sky site. I can even see M81 from my light-polluted backyard using my 102mm refractor.
I used 4.5-minute subs for this picture, which is the longest exposures I have ever captured with my DSLR camera. I think I could go to about 5 minutes on a moonless night, but that’s probably it for my light polluted backyard. I desperately need to invest in an IDAS clip-in filter for my Xsi!
The Explore Scientific ED80 APO in my backyard
Here are the details of this photo:
22 x 270″ ISO 1600
Stacked with dark, bias and flat
ES ED80 Triplet APO Refractor
Celestron CG-5 GoTo Mount
Orion Mini 50mm Guidescope
Meade DSI II Guide Camera
Stock Canon 450D DSLR
Stacked in DSS
Processed in PS CS5
A close-up of the M82 galaxy (The Cigar Galaxy)
I have since captured these galaxies many times using a variety of telescopes and cameras. Here is a video of one of my backyard imaging sessions where I capture M81 and M82 with a cooled CMOS camera in place of a DSLR.