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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 07 Feb 2008 (Thursday) 22:59
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M31, The Andromeda Galaxy

 
Nighthound
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Feb 07, 2008 22:59 |  #1

I went back and reprocessed some previous data. I wanted to try and improve on the color, detail and keep the star sizes under control. It's easy to cause the stars to bloat when stretching the image in Photoshop. The spikes on the brighter stars were produced by nylon fishing leader crossed in front of the telescope optics.

Takahashi Sky 90 II(f/4.5, 407mm) • Losmandy G-11 • Canon 20D(unmodified) • IDAS Light Pollution Filter • 800/1600 ISO, No Dark or Flat Frames • 30 x 240 sec. Exposures Stacked • All Exposures Unguided • Noel Carboni's Astro Tools for PS

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Thanks for looking,
NH

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Chris ­ Dana
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Feb 07, 2008 23:04 |  #2

Wow. Just wow.

Amazing photograph.


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daveleeuk
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Feb 08, 2008 04:19 |  #3

Nighthound wrote in post #4874464 (external link)
The spikes on the brighter stars were produced by nylon fishing leader crossed in front of the telescope optics.

What does that mean? 'nylon fishing leader'

But great work, your images are insane! You seem to be amazing at what you do!


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Feb 08, 2008 04:49 |  #4

Holy Space Cow!

I got tired just imagining all the work you went through to get this shot...

Gotta love it! Amazing work, indeed! Congratulations!


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Feb 08, 2008 05:03 |  #5

Thanks everyone.

Daveleeuk, fishing leader is used to set the hook back from the fishing monofilament line. To over simplify it's a length of black nylon string with a fastener at each end. I cut off the fasteners and just use the line. The black nylon gives less of a rainbow color in the star spikes than the translucent fishing line does. By taping two pieces like cross hairs in front of the scope lens(two in this scope), the brighter stars will display spikes. Doing this was a phase I went through. I don't use the fishing leader these days, now I go for a more natural look.

NH


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Feb 08, 2008 05:13 |  #6

awesome


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Feb 08, 2008 12:05 |  #7

Thanks Peter, glad you enjoyed.

NH


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Feb 08, 2008 15:59 as a reply to  @ Nighthound's post |  #8

Steve, your shots are all incredible. The work you put into the whole process is definatly worth it, Thanks for sharing.


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Feb 08, 2008 16:23 |  #9

simply stunning


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Feb 08, 2008 16:26 |  #10

Beautifull!

Oh P.S.,.. Nasa called, they want the Hubble back! :lol:


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Pandragon
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Feb 08, 2008 17:29 |  #11

I am always impressed with your shots Nighthound. I envy your patience for putting something like this together.


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strgazr27
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Feb 08, 2008 21:39 |  #12

Steve,

Ya gotta love the FOV of the 90, not to mention the optics! although for me it's a little soft, ya still nailed it :) I think it's one of the hardest objects to process due to all the dynamic range involved.

Another Great One!

CS's

Bobby


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Pen6uiN
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Feb 09, 2008 07:59 |  #13

holy cow

so cool


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Feb 09, 2008 11:10 |  #14

Wonderful photography. How far is this galaxy from us?


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Feb 09, 2008 11:35 |  #15

Thanks very much everyone.

Bobby, the Sky 90 is a keeper alright. I agree that the image is a bit soft so I tried some sharpening, tried to limit to to the dust lanes. See below. I was hoping to get a bunch of time this year with the 5D but it didn't work out. I think it would beat the 20D details and clarity seen in this one.

rw2, M31 is about 2.3 million light years distant. It's the most distant object visible to the naked eye.

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NH

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M31, The Andromeda Galaxy
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