Mesa Vista Observatory
  • Home
    • About Me
  • Observatory
    • Construction
    • Equipment
    • Light Pollution
  • Astrophotography
    • Solar System
    • Deep Sky
  • Astro Blog
  • Astro Links
  • Forums
  • Outreach
  • Contact

Deep Sky Imaging

Deep Sky Object Imaging, or DSO imaging as it is often called, is probably the most challenging type of astrophotography there is.  To do it right requires use of specialized hardware such as a DSLR or CCD camera, specialized software, a lot of precision, a little artistic ability, a boatload of money, and a ton of patience.  Most of us don't have all those things, so we make do with the tools we have and whatever we can afford to invest in the hobby.

Back in the late 90's, I purchased a Meade Pictor 216XT monochrome CCD camera.  This was one of the first "affordable" amateur cameras on the market.  It had a tiny CCD chip.  It was an experiment to see if the hardware and software had advanced enough to make this a viable interest for me.  I captured a lot of "things" with that camera, but never a single image that I was happy enough to share.  Experiment complete --- I needed to wait for the hardware to advance and mature a little more, not to mention come down in price dramatically.

Jump forward to 2014. After a year of researching and debating, I finally decided to take take the plunge and purchase a decent DSO camera.  The camera that I believe offered the best balance for my skill set and wallet was the SBIG STF-8300M monochrome CCD camera.  I also purchased the FW-8 filter wheel, a set of LRGB, Ha, S2, and O3 filters, the OAG-8300 off-axis guider, and an ST-i guiding camera.  While not an ideal match for my telescope, the camera is very flexible and should provide me many years of satisfaction.

I'm just learning how to use this setup and only have a few photos to share at this point.  They aren't very good, but as any amateur will tell you, you're always proud of your "first light" images.


Picture
M81 - May 7, 2014
  • Object Type: Galaxy
  • Scope: CGE PRO 1400 HD
  • Filter/Lens: Luminance only
  • Camera: STF-8300M, ST-i OAG
  • Exposure: 5x300 seconds, 3x3 bin
  • Seeing:  Good
  • Processing: Nebulosity, Photoshop 
  • Thoughts:  This is the first image I ever captured with my DSO camera.  It's not sharp, guiding was poor, the stars are not round, I didn't capture enough subframes, and it's not processed well, but it's my first image.

Picture
M3 - May 20, 2014
  • Object Type: Globular Cluster
  • Scope: CGE PRO 1400 HD
  • Filter/Lens: LRGB (color)
  • Camera: STF-8300M, ST-i OAG
  • Exposure: L 5x120 seconds, RGB 4x120 seconds, all 3x3 bin
  • Seeing:  Fair (Moon 1/2 full)
  • Processing: Nebulosity, Photoshop 
  • Thoughts:  My first color image.  This one came out much better.  Focus is decent and color looks natural.  Tracking is good and the stars are round.  I didn't over process the color as I've seen in a lot of versions of M3 so it's more subtle.


Picture
M27 (Dumbbell Nebula) - Sept. 18, 2015
  • Object Type: Planetary Nebula
  • Scope: CGE PRO 1400 HD
  • Filter/Lens: LRGB (color)
  • Camera: STF-8300M, ST-i OAG
  • Exposure: L 10x60 seconds, RGB 10x60 seconds, all 3x3 bin
  • Seeing:  Good (Moon 1/3)
  • SQM Reading - 20.29, NELM - 5.7
  • Processing: Nebulosity only 
  • Thoughts:  My best image yet.  Tracking and focus were very good throughout the entire session.  Some dewing occurred midway through, but didn't drastically affect the quality.

Picture
NGC 7331 (Deer Lick Group) - Oct. 14, 2015
  • Object Type: Spiral Galaxy
  • Scope: CGE PRO 1400 HD
  • Reducer: 0.7x Focal Reducer
  • Filter/Lens: LRGB (color)
  • Camera: STF-8300M, ST-i OAG
  • Exposure: L 10x180 seconds, RGB 6x180 seconds, all 3x3 bin
  • Seeing:  Excellent (No Moon)
  • SQM Reading - 20.53, NELM - 5.8
  • Processing: Nebulosity/Photoshop 
  • Thoughts:  Excellent shot of NCG 7331  Guiding and focus were very good.  Minor dew by the time I got to the blue filter shots.  There isn't as much detail as I hoped for in the other galaxies in the group, but they are much further away. Overall, I'm pleased with the outcome.

Picture
NGC 7380/Sh2-142 (Flying Horse/Wizard Nebula) - Oct. 16, 2015
  • Object Type: Open Cluster/Nebula
  • Scope: CGE PRO 1400 HD
  • Reducer: 0.7x Focal Reducer
  • Filter/Lens: LRGB (color)
  • Camera: STF-8300M, ST-i OAG
  • Exposure: HA 11x180 seconds, R 6x180, G 5x180, B 6x180 seconds, all 3x3 bin
  • Seeing:  Excellent (Below Horizon)
  • SQM Reading - 20.4, NELM - 5.8
  • Processing: Nebulosity/Photoshop
  • Thoughts:  This one was hard to get with my scope given the small field of view, even with the focal reducer.  It would be better framed with a smaller scope with a wider field of view, but I like the level of detail captured that you would miss with a smaller scope.  Guiding was challenging given the proximity to the north celestial pole, but the stars are decently round.  This was the first image where I've used an HA filter for the luminance channel.

Web Hosting by FatCow