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FORUMS Photo Sharing & Discussion Astronomy & Celestial 
Thread started 16 May 2013 (Thursday) 08:30
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NGC 5139 (first attempt)

 
legoman_iac
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Location: Sydney
     
May 16, 2013 08:30 |  #1

First chance I've had to shoot this ... it's just popping up over my roof at the moment.

19min 30sec of light subs, no darks or flats.

Realised afterwards, as I aimed at Saturn, that focus was out a little bit. Whoops, should have used my b-mask. Keen to get feedback, comments or complaints?

IMAGE NOT FOUND
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO


(Bigger version here: 33% of original stack, slightly cropped. (external link)

- Daniel

2x 50d: with 17-85mm f4-5.6, 100mm Macro USM, 50mm f1.8, 2x Sigma 30mm f1.4, 55-250mm (kit lens), Canon 100-400mm L, Tamron 200-400mm f5.6, Samyang 8mm. 480mm refactor with HEQ5. Home made beamsplitter stereo rig.

  
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Celestron
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May 16, 2013 16:22 |  #2

Got some coma at the edges but other than that very nice . What equipment , scope did you use ??




  
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SteveInNZ
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May 16, 2013 19:45 |  #3

Well done. It must be something about that glob. I can never get a decently focused image of it, either.
I agree with Ron. A field flattener could be on your Christmas list. Or a cheaper option is to crop it a bit and remove the worst offenders.
Good to see that your out there using it.


"Treat every photon with respect" - David Malin.

  
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legoman_iac
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May 30, 2013 16:02 |  #4

Coma? No, no ... Isn't it because the universe is expanding? Which is also why it's difficult to focus, haha. Thanks for the comments and feedback, will look into the field flattener. Using the Orion ed 80t cf on a heq5 Mount.


2x 50d: with 17-85mm f4-5.6, 100mm Macro USM, 50mm f1.8, 2x Sigma 30mm f1.4, 55-250mm (kit lens), Canon 100-400mm L, Tamron 200-400mm f5.6, Samyang 8mm. 480mm refactor with HEQ5. Home made beamsplitter stereo rig.

  
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Celestron
Cream of the Crop
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Location: Texas USA
     
May 30, 2013 22:25 |  #5

legoman_iac wrote in post #15983613 (external link)
Coma? No, no ... Isn't it because the universe is expanding? Which is also why it's difficult to focus, haha. Thanks for the comments and feedback, will look into the field flattener. Using the Orion ed 80t cf on a heq5 Mount.

Nope , it's coma alright . Look on the left side of the image . Universe will never expand fast enough to capture coma ;) . Focus isn't that much of a problem here .




  
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NGC 5139 (first attempt)
FORUMS Photo Sharing & Discussion Astronomy & Celestial 
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