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EAA with a manual Dobson... it´s working!

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#101 SonDob

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Posted 01 March 2019 - 02:47 PM

Ok Ill read into the differences and try out. Thank you

#102 descott12

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Posted 01 March 2019 - 03:55 PM

Here is an example M42/NGC1977 with and without flats. I posted these in another thread but couldn't quite remember where...

Anyway the "without flat" image looks alot like yours with a bright circle in the center.

 

It did occur to me that you might have a bit of trouble getting this to work without automatic tracking but it would be an interesting experiment.

 

Note: I had to shrink and resize these image to upload. The vignette effect was actually quite a bit more noticeable on screen.

 

EDIT: I forgot to include the exposure settings. Both shots were 1 minute stacks with a 5 second exposure using my Evo 8 + Hyperstar + ASI 294 MC

Attached Thumbnails

  • M42-withflat.png
  • M42-withoutflat.png

Edited by descott12, 01 March 2019 - 06:14 PM.


#103 SonDob

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Posted 01 March 2019 - 04:54 PM

Thank you for the example. I agree it looks very similar. Ill try it out. Also the camera can compensate vignetting but i never enabled that function before. Ill try both out

#104 Ubuntu

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Posted 07 March 2019 - 02:13 PM

NGC2207, 2 galaxies in interaction: 173 frames, total 87s

Stack_173frames_87s_WithDisplayStretch V2.jpg

 

NGC4762, paper-kite galaxy: 183 frames, total 92s

Stack_183frames_92s_WithDisplayStretch V2.jpg

 

NGC4535, The lost galaxy of Copeland: 304 frames, total 152s

Stack_304frames_152s_WithDisplayStretch V2.jpg

 

M49: 105 frames, total 53s

Stack_105frames_53s_WithDisplayStretch V2.jpg

 

M86, M84, NGC4402: 172 frames, total 86s

Stack_172frames_86s_WithDisplayStretch V2.jpg

 

M99: 184 frames, total 92s

Stack_184frames_92s_WithDisplayStretch V2.jpg

 

M91: 225 frames, total 113s

Stack_225frames_113s_WithDisplayStretch V2.jpg

 

 


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#105 Ubuntu

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Posted 11 March 2019 - 01:58 PM

ARP 321: 94 frames, total 47s  Sharpcap pro 3.2

Stack_94frames_47s_WithDisplayStretch V2.jpg

 

M13: 23 frames, total 6s

Stack_23frames_6s_WithDisplayStretch V2.jpg

 

Centaurus A, hamburger galaxy: 70 frames, total 70s

Stack_70frames_70s_WithDisplayStretch V2.jpg


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