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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 30 Mar 2012 (Friday) 23:11
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Great Nebula taken with DSLR

 
scorpio1155
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Mar 30, 2012 23:11 |  #1

Hello... This photo of the Great Nebula in Orion's sword (Theta Orionis) was obtained with my 300mm f/8 William Optics refractor riding piggy-back on my 12-inch Meade LX200. It was my usual formula of 12, five-minute subexposures aligned and stacked. Camera control, and some processing was done using Images Plus. By the way, the effective focal length of the system was 480mm thanks to the 1.6 crop factor of my 500D.


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madjack
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Mar 30, 2012 23:32 |  #2

Wow! thats amazing....


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Toxic ­ Coolaid
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Mar 30, 2012 23:35 |  #3

Are you taking Darks and Flats to use with Deep Sky Stacker?




  
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spit
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Mar 31, 2012 06:45 |  #4

your processing gives alot of color noise and oversaturation




  
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Celestron
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Mar 31, 2012 09:05 |  #5

Got alot of detail . Since you have Image Editing OK i worked on the noise some in Cs5 . If you don't like it let me know and i'll remove it .




  
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scorpio1155
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Apr 02, 2012 01:09 |  #6

Celestron wrote in post #14185721 (external link)
Got alot of detail . Since you have Image Editing OK i worked on the noise some in Cs5 . If you don't like it let me know and i'll remove it .

No, no, please leave it. I like it better than my processing. I still think that some of my biggest challenges are the blue halos around bright stars. Thank you for offering your version!


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scorpio1155
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Apr 02, 2012 01:14 |  #7

Toxic Coolaid wrote in post #14184442 (external link)
Are you taking Darks and Flats to use with Deep Sky Stacker?

Darks yes, flats no... I haven't quite figured out how to do them effectively yet. I have a white board that I illuminate and shoot when gathering flats for the ST-7XME (when shooting a focal length of 1524mm), but the board isn't big enough to use with the 480mm (300mm with 1.6 crop factor) coupled to the DSLR.... Hmmm....


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alexg212
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Apr 02, 2012 07:20 |  #8

Celestron wrote in post #14185721 (external link)
Got alot of detail . Since you have Image Editing OK i worked on the noise some in Cs5 . If you don't like it let me know and i'll remove it .

Can I send you some of my pictures!!?!!? ;) just kidding that is great, I wouldn't have thought that was possible.


5D MKII/ 7D/ 100-400 L/ EF-S 10-22 / 100L f2.8 IS Macro / 70-200L f4 IS / Σ 30 f1.4 / 50 f1.8 / Tamron 18-270 / 430 EX II (x2) / Opteka fisheye/ Zoom 1n

  
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Celestron
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Apr 02, 2012 07:53 |  #9

scorpio1155 wrote in post #14194642 (external link)
... my biggest challenges are the blue halos around bright stars. Thank you for offering your version!

You can help that with a Minus Violet Filter in refractors . Check these out by Lumicon but i'm sure there are other brands .

http://www.lumicon.com …5&cn=Minus+Viol​et+Filters (external link)




  
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Celestron
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Apr 02, 2012 07:55 |  #10

alexg212 wrote in post #14195399 (external link)
I wouldn't have thought that was possible.

I use Topaz DeNoise (external link) but some others use LR3 but it's a bit more complicated .




  
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alexg212
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Apr 02, 2012 08:01 |  #11

Celestron wrote in post #14195488 (external link)
I use Topaz DeNoise (external link) but some others use LR3 but it's a bit more complicated .

Thanks, I think I'll give that a try!


5D MKII/ 7D/ 100-400 L/ EF-S 10-22 / 100L f2.8 IS Macro / 70-200L f4 IS / Σ 30 f1.4 / 50 f1.8 / Tamron 18-270 / 430 EX II (x2) / Opteka fisheye/ Zoom 1n

  
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RustyHammer
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Apr 03, 2012 14:42 |  #12

Nice work ... both of you!!!


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MidnightSun
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Apr 03, 2012 16:25 |  #13

Processing is as important as the shots themselves. I never thought there would be so much involved AFTER the shot is taken...............Ni​ce one by the way.


Dave
Canon 350D, AE-1, Orion 8" Newt. f/4.9; EQ6 w/ modified motor drive; Orion 70mm f/10 Refractor Guide Scope; Celestron NexImage CCD Imager; Starshoot Autoguider. Orion Electronic Focusers.
Astro Setup / Midnight Sun Astrophotography (external link)

  
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hairy_moth
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Apr 03, 2012 16:33 |  #14

Pretty cool!


7D | 300D | G1X | Tokina 11-16mm f/2.8 | EF-S 17-55mm f/2.8 | EF-S 60mm f/2.8 Macro | EF 85mm f/1.8 | 70-200 f/2.8L MkII -- flickr (external link)

  
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Toxic ­ Coolaid
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Apr 03, 2012 17:10 |  #15

scorpio1155 wrote in post #14194655 (external link)
Darks yes, flats no... I haven't quite figured out how to do them effectively yet. I have a white board that I illuminate and shoot when gathering flats for the ST-7XME (when shooting a focal length of 1524mm), but the board isn't big enough to use with the 480mm (300mm with 1.6 crop factor) coupled to the DSLR.... Hmmm....

For Flats just shoot the sky when it's clear. I usually take 50-60 which gives me a nice even master flat. It does not matter that the sky is blue, you just don't want clouds passing by.




  
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Great Nebula taken with DSLR
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