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Old 18-11-2010, 04:33 PM
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mswhin63 (Malcolm)
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mswhin63 is offline
 
Join Date: May 2009
Location: Para Hills, South Australia
Posts: 3,622
M42 My Very second narrow field attempt.

Hi Everyone,


I didn't expect to even consider narrowfield deep space but here it is. There is a lot I have to explain so I will list it;
  1. Dobsonian 12" 1500mm - Lots of Coma distortion and as I didn't expect to deep sky narrow-field haven't bought a Coma corrector.
  2. Happy Snaps - 45 x 10 second snaps ISO 1600 20 x darks and 20 x library Offsets. Any lower ISO or longer shots, my mount wouldn't have handled it. I am happy with noise levels though.
  3. EQ platform, No guiding at all, each snap was hopeful tracking. Mount is out of balance a bit, was design as a prototype needs more refinement for better tracking.
  4. 65 Shots taken - 35 used in final stack better than 50%
  5. Unmodded Rebel XSi / 450D
  6. Used APT to take snaps as well.
  7. Electric focuser came today so had to manual focus last night.
  8. Colours - don't go there, wouldn't have a clue
  9. DSS stack nothing else.
Apart from that overall I am happy with my 2nd attempt, although my first attempt was a single shot shot using the camera shutter, wobbled everywhere.

I am not really after any serious comments on composition but are welcome, I don't think I could handle it at the moment. I expect before I serious commit to low cost DS AP I will get a guide/widefield scope attached to the DOB.

Enjoy
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